The F3 Register

[richban]

After a play at the vic club last year and a taste of the Suzuki series in F3. I am hooked. I will be back this year.

For me its the perfect class. I love building and tuning bikes. And love racing. Its a great class that embraces innovation and out of the box thinking. Its one of the last real Formula classes in NZ. Lets keep it alive.

I keep hearing talk that it is dying. Well I will do what I can to keep it alive. Hence this thread. Below is my bike an NSR MC21 dry clutch 300. Its a fab bike to ride. About as close to a proper GP bike as you can get. This season it will have upgraded barrels that will see some proper power. Its goes all day and does not eat rubber. She's a heavy drinker but no ones perfect. Man its taught me a thing or 2 about riding and setup.

So if you have something in the shed already or you are building something maybe post up some pics here. It will be cool to see what people are building and thoughts on the class as a whole. For fecks sake. Lets change the name back to F3. Superlite does not sound right to me?


310046310048

[Mental Trousers]

Best class there is if you ask me.

For my bike there's only 1 rule, 3 cylinders <= 450cc. There's not many more rules for other engines either. It doesn't matter what configuration of cylinders or cycle your bike is there's no incentive to cheat because you can do so many other things to get power. You can be as creative as you like. There's a 1 litre single cylinder I'd love to try sometime and there's only 1 class where I can use it.

[Grumph]

I'm in a difficult position re the current setup, with open fuel the capacity breaks made sense, IMO they don't now.
Also while I realise that the 400 fours the class was designed around are no longer current and to keep the class alive it was necessary to introduce the 650 twins, I don't like it as that has obsoleted so much machinery.
If you want to run a big fourstroke single, agitate for open fuel again as without it you're pushing shit uphill.

[richban]

I'm in a difficult position re the current setup, with open fuel the capacity breaks made sense, IMO they don't now.
Also while I realise that the 400 fours the class was designed around are no longer current and to keep the class alive it was necessary to introduce the 650 twins, I don't like it as that has obsoleted so much machinery.
If you want to run a big fourstroke single, agitate for open fuel again as without it you're pushing shit uphill.

I think the rules are working well. Did you watch any of the nat's at all? The 4 fastest bikes at Taupo were a 450 single a 450 4 a 450 3 and a 650 2. And if you put someone fast on a 300 2 smoke you are quite well covered. Its working.

The next project for me will be a 690 duke in an NSR roller. I have the roller. 80hp with almost the same toque's will be competitive on NZ tracks and a real weapon on the street circuits.

[steveyb]

There is no reason why the rules need to remain the same as they are now, even agreeing that the current structure is working well.
If you have good reason for changing a rule(s), prepare a proposal with good research and good writing and submit it to MNZ for consideration.
I think that the fuel thing is a good example, though it is unlikely that MNZ would consider making fuel 'open' but would be open to at least Avgas or FIM100, I would think.
In reality though, does anyone need anything more exotic than that?

I think that there might now also be a case for allowing 250GP bikes into the class, perhaps with an model year limit of 2000?

I know that the boys who built/run the class leading Kawasaki 450 are thinking about putting the engine into a modern chassis. So development is being thought about and maybe planned.
There are so many ways to skin a cat in Formula racing, that it always makes sense to keep massaging rule structures to allow new ideas a place to take hold.

I personally have not always been an advocate for F3 at the national level, but I am happy to be proven wrong and to support innovation (after all that is what I do for a living). While 250GP bikes might not be all that innovative, there are a few around sort of looking for a place to run and this could be it. In support of the argument, I know that if I race my bike at National level in F3, I am not going to be anywhere near Zane or Av or Gav and that lot. Another rider on it, maybe. But that is why one would think about a model year limit.

Anyway, good stuff.

[richban]

I personally have not always been an advocate for F3 at the national level, but I am happy to be proven wrong and to support innovation



Good to hear. If they were slow and boring then I think yeah, why at National's. But they are far from slow or boring. We just need more of them. Superbike lap from Hampton 01:03.734. Super Sport lap 01:05.263. F3 lap 01:09.632. Bit of rounding and its about 3 seconds difference. So maybe a good stepping stone if you want to go onto 600's or 1000's. Or come from 250 production.

[Mental Trousers]

I think that the fuel thing is a good example, though it is unlikely that MNZ would consider making fuel 'open' but would be open to at least Avgas or FIM100, I would think.


10.17.1 The following classes shall be restricted to petrol having maximum
characteristics not exceeding “Avgas or Unleaded FIM” as defined in Appendix
E. ......... All Road Race classes except those classes listed in
10.17.2 and 10.17.3.

Superlite isn't listed in 10.17.2 or 10.17.3 so can use avgas to 108MON or unleaded up to 100MON.

Pretty sure Chris Osbourne has been running a 50/50 avgas/petrol mix in recent times on his 450 triple. Like it doesn't make enough grunt already :facepalm:

[FROSTY]

Im heading back on into F3 again I think. But this time Ill do it properly.
Start with a decent late model base bike and build it up from there.
greg has proven what can be done with the R6, ozzie with an older Gixxer 600
But what if you start with a lighter bike with better bottom end and mid range to start with?
MMMM.
did think the K7 was a good start till I got talking about the L2 engines.

[richban]

http://www.bonhams.com/auctions/21135/lot/413/

http://www.metalmeet.com/forum/showthread.php?t=9418


310130

310131

310132

[allribs]

I raced f2 for a year and found it to expensive to run at top level,also all I could do in my man cave is polish it and change the oil.
So went back to f3 and being a engineer I built a rs 450,real exciting to ride,reliable,cheap to build,set of tires last ages.
Raced at nats last weekend,awsome close racing with Avalon and Zane with 3 completely different bikes.
I wont be changing from f3.

[richban]

I raced f2 for a year and found it to expensive to run at top level,also all I could do in my man cave is polish it and change the oil.
So went back to f3 and being a engineer I built a rs 450,real exciting to ride,reliable,cheap to build,set of tires last ages.
Raced at nats last weekend,awsome close racing with Avalon and Zane with 3 completely different bikes.
I wont be changing from f3.


Good to hear mate. I am saving me penny's now to do the Nationals and Suzuki series this year.

When yah get a mo could you post up some pics of yah bike.

Whats yah address? I'll send you some pie's

[quickbuck]

When yah get a mo could you post up some pics of yah bike.


#45

https://plus.google.com/photos/117238910642550232767/albums/6126376346137585009/6127057766582470226?hl=en&pid=6127057766582470226&oid=117238910642550232767

https://plus.google.com/photos/117238910642550232767/albums/6126376346137585009/6127057746539494690?hl=en&pid=6127057746539494690&oid=117238910642550232767

https://plus.google.com/photos/117238910642550232767/albums/6126376346137585009/6127058151565406050?hl=en&pid=6127058151565406050&oid=117238910642550232767

https://plus.google.com/photos/117238910642550232767/albums/6126376346137585009/6127058136551568114?hl=en&pid=6127058136551568114&oid=117238910642550232767

https://plus.google.com/photos/117238910642550232767/albums/6126376346137585009/6127058414845658466?hl=en&pid=6127058414845658466&oid=117238910642550232767


Photos by Andrew Phillipson at Rd 4 NZSBK 2015.

[allribs]

Good to hear mate. I am saving me penny's now to do the Nationals and Suzuki series this year.

When yah get a mo could you post up some pics of yah bike.

Whats yah address? I'll send you some pie's

tiddles2@slingshot.co.nz,was good to see your mate Richard out there on his 300 at Taupo,shit they sound good

[quickbuck]

was good to see your mate Richard out there on his 300 at Taupo,shit they sound good

Yeah, they go well and a 600 of similar age has to be really peddled to keep up with them too ;)

[richban]

tiddles2@slingshot.co.nz,was good to see your mate Richard out there on his 300 at Taupo,shit they sound good

Yeah they do sound good. In 4 weeks there will be 4 of them ready for the track. Couple of others thinking about it. That should help the F3 fields.

[Mental Trousers]

The biggest problem with the Superlite/F3 class is there's lots of bikes out there, but the owners seem to be content fiddling with them in the shed rather than riding them.

[steveyb]

Yeah they do sound good. In 4 weeks there will be 4 of them ready for the track.

Any of them ON the track??

[richban]

Any of them ON the track??

2 new builds happening now. So with mine and Richards thats 4 ready for racing the winter series. Goal is more by Suzuki Series. Lots of development over the last year has given us a good knowledge base to put these together quick. Mine did not miss a beat all last year.

[quickbuck]

2 new builds happening now. So with mine and Richards thats 4 ready for racing the winter series. Goal is more by Suzuki Series. Lots of development over the last year has given us a good knowledge base to put these together quick. Mine did not miss a beat all last year.

Just the pilot then ;)




.... to be fair the Pilot of my 600 had a brain fart too....

https://www.youtube.com/watch?v=iHyE-cQAm3M


Points table for 90's Carbies:

http://organisation.mylaps.com/championship/view.jsp?id=35824#_ga=1.122948875.144586334.142380 7061

[DerekP]

F3/Superlite is indeed a fantastic class. What we need is more bikes on the grid at Nationals. This would help inspire people and give them confidence that it is a prospering class; not one that has a limited life expectancy.
If we could get enough people to commit to doing Nationals in Superlight then we could get a race of our own...similar to what the pro-twin people did a couple of years ago. Unfortunately this could be the death nail for 125gp...but I suspect that is only a matter of time before they go the same way as 250gp...

[chrisc]

They will when people keep speaking about them like that^ and not encouraging young riders onto them. Their incredible ability to teach riders will unfortunately only likely be realised when it's too late and our up and coming star riders learn to race tractors before jumping onto 600s. Comparing 125Gp and 250GP is apples and oranges, comparing GP bikes and production racers is kiwifruit and potatoes.

That aside, I like superlite/F3 a lot, especially the NSR300s and the RS450! Leigh, you're riding like a mad man out there, nice one! I'd love a go on lots of the bikes in the class and I enjoy trying to outride the bigger capacity bikes on my RS125 at club meetings.

https://farm9.staticflickr.com/8691/16877417726_e948832f7c_c.jpg (https://flic.kr/p/rHpbhN)

[gammaguy]

Yeah they do sound good. In 4 weeks there will be 4 of them ready for the track. Couple of others thinking about it. That should help the F3 fields.

If I read the rules correctly then the real weapon would be a warmed over NS400R...

I happen to have an engine.......

and an RG400 Rolling Chassis.....

hmmmm

[allribs]

They will when people keep speaking about them like that^ and not encouraging young riders onto them. Their incredible ability to teach riders will unfortunately only likely be realised when it's too late and our up and coming star riders learn to race tractors before jumping onto 600s. Comparing 125Gp and 250GP is apples and oranges, comparing GP bikes and production racers is kiwifruit and potatoes.

That aside, I like superlite/F3 a lot, especially the NSR300s and the RS450! Leigh, you're riding like a mad man out there, nice one! I'd love a go on lots of the bikes in the class and I enjoy trying to outride the bigger capacity bikes on my RS125 at club meetings.

https://farm9.staticflickr.com/8691/16877417726_e948832f7c_c.jpg (https://flic.kr/p/rHpbhN)

Cheers,you will have to have a ride on one of these angry little bikes,all ways puts a smile on me dial

[quickbuck]

If I read the rules correctly then the real weapon would be a warmed over NS400R...

I happen to have an engine.......

and an RG400 Rolling Chassis.....

hmmmm

Ummm, Yup, Build it and bring it out... (Might be a trek form Banks to Manfeild, but it has been done before).. It will even qualify for Posties.

The NSR300's are making a lot power though... Almost as much as a standard RG500 ;)

[richban]

If I read the rules correctly then the real weapon would be a warmed over NS400R...

I happen to have an engine.......

and an RG400 Rolling Chassis.....

hmmmm


The best thing about the class is that there is no perfect bike. Its what the rider thinks is the best option. What works for some does not work for others. There are also good options around that don't need to be all custom. The best bike in the world can still go slow with the right lump of meat on top.

[Grumph]

If I read the rules correctly then the real weapon would be a warmed over NS400R...

I happen to have an engine.......

and an RG400 Rolling Chassis.....

hmmmm

forget the RG400 chassis - it's heavy and crap geometry.
If you're serious, I've got a CBR250RR chassis here you could use which would be a much better choice.

[steveyb]

Put that NS400 engine in an NSR250 chassis!
Then you would be talking!

[richban]

Put that NS400 engine in an NSR250 chassis!
Then you would be talking!

God imagine trying to build the pipes.

[Mental Trousers]

God imagine trying to build the pipes.

Give them to Wobbly and hope you don't have to sell too many body parts.

[Autech]

Ran my first race in F3 yesterday at Ruapuna, some serously quick bikes and riders (I'm slow) out there. Hoping that some day I might be able to get up there an have a blast with them, just gotta keep knocking my lap time down bit by bit. Not sure how competitive an NC24 on sport demons with me on top will ever be though, might have to get out in the shed and start tinkering... :headbang:

[quickbuck]

...., might have to get out in the shed and start tinkering... :headbang:
That's where it begins..........
.



.......

and never really ends.

[richban]

Ran my first race in F3 yesterday at Ruapuna, some serously quick bikes and riders (I'm slow) out there. Hoping that some day I might be able to get up there an have a blast with them, just gotta keep knocking my lap time down bit by bit. Not sure how competitive an NC24 on sport demons with me on top will ever be though, might have to get out in the shed and start tinkering... :headbang:

Is it still on the 18" rear? Hard to find good rubber from memory. The main thing is not to tinker it to death. Been there done that.:facepalm:

[Autech]

Is it still on the 18" rear? Hard to find good rubber from memory. The main thing is not to tinker it to death. Been there done that.:facepalm:

Yeah and the 16 front. My choice is Sport Demons or BT45s, much of a muchness from what I have been told but not a bad tyre, just nothing on a Corsa or similar.

That's the plan though, learn all I can learn on this bike till I reach the limit of it and the tyres and then look to something else, no point pouring $$$ into a bike which I can't get good rubber for. Would love a '89 NC30 down the line but will see how my riding progresses and make my choice then. Still a fantastic bike though, great engine on it and not too shabby in the corners, just needs a decent block head on top to show the world what it's got.

[Deano]

I wish people would stop blaming SV650s for the demise of F3.

The 400's (bored to 450) screamers are just as quick and have better brakes and front ends. The 450 triples are faster, as are the 450 single/125 framed hybrids. As for the 2T 300 or 400's, well.......most SV's are pissing in the
wind.

A pretty standard 1989 400 shouldn't be competitive in 2015, except maybe in Post Classic Junior, where they now belong.

[Deano]

They will when people keep speaking about them like that^ and not encouraging young riders onto them. Their incredible ability to teach riders will unfortunately only likely be realised when it's too late and our up and coming star riders learn to race tractors before jumping onto 600s. Comparing 125Gp and 250GP is apples and oranges, comparing GP bikes and production racers is kiwifruit and potatoes.

That aside, I like superlite/F3 a lot, especially the NSR300s and the RS450! Leigh, you're riding like a mad man out there, nice one! I'd love a go on lots of the bikes in the class and I enjoy trying to outride the bigger capacity bikes on my RS125 at club meetings.

https://farm9.staticflickr.com/8691/16877417726_e948832f7c_c.jpg (https://flic.kr/p/rHpbhN)

There's many a very good racer who did not do 125GP, but instead went via 250 Proddie or 650 Pro Twin.

[richban]

There's many a very good racer who did not do 125GP, but instead went via 250 Proddie or 650 Pro Twin.

For sure. Talk to different people and you get a different answer / preference. I wish I was racing when the 2 smoke proddie bikes were all go go. I love the size of them bikes. They are like 125's for anyone over 6 foot.

You out for the Winter Series Deano?

[Autech]

A pretty standard 1989 400 shouldn't be competitive in 2015, except maybe in Post Classic Junior, where they now belong.

Which is where I will be doing most my racing :). Will treat my ventures into the F3 class as seat time and if I end up better than last I will be chuffed. Would love to build a 125gp hybrid of some description down the line, must be really rewarding building your own race machine from ground up.

[Deano]

Which is where I will be doing most my racing :). Will treat my ventures into the F3 class as seat time and if I end up better than last I will be chuffed. Would love to build a 125gp hybrid of some description down the line, must be really rewarding building your own race machine from ground up.

That's where I started on an 89 CBR400RR - cheap as chips racing and cross entering in F3 keeps ya busy !

I won't be doing the winter series Rich - had thought about the last two rounds as practice for Suzuki Series but they clash with the boys MX.

[steveyb]

must be really rewarding building your own race machine from ground up.

You might think that. But mostly it is blood, sweat, tears and heartache.
Unless you do it right that is!!!
:argh:

[budda]

The best thing about the class is that there is no perfect bike. Its what the rider thinks is the best option. What works for some does not work for others. There are also good options around that don't need to be all custom. The best bike in the world can still go slow with the right lump of meat on top.

EXACTLY - this thread is the conversation we TRIED to generate when my Commission changed the rules specifically to encourage more back-yard builders back into Champs level racing.

There ARE many who choose to create their perfect bike, rather than buy one - it it werent for this Class, the only Champs level outlet for these guys is Sidecars - much as I personally love chairs, they are not for everyone ...... dont just get building, get RIDING what you've built :niceone:

[Sketchy_Racer]

And another one on it's way to becoming a F3 racer.....

[steveyb]

What are those plates with the round things at the back there?
Some new aerodynamic doo-hickey for keeping the thing in line?
Or drinks holders?

[Shaun Harris]

What are those plates with the round things at the back there?
Some new aerodynamic doo-hickey for keeping the thing in line?
Or drinks holders?




nah, they are for hooking the tips of your boots into for better slip streaming. Glenn is a rider I would love to see back on track showing his pure naturall brilliant talent. Most naturall since Stroud, crafer, slight I say. oooops, Sketcky racer is Glenn S EH?

[Pumba]

What are those plates with the round things at the back there?
Some new aerodynamic doo-hickey for keeping the thing in line?
Or drinks holders?

Nitrous bottle brackets :devil2:

[Bert]

nah, they are for hooking the tips of your boots into for better slip streaming. Glenn is a rider I would love to see back on track showing his pure naturall brilliant talent. Most naturall since Stroud, crafer, slight I say. oooops, Sketcky racer is Glenn S EH?

Na he's got old and slow now....;)
Looking good.
The question is can Sketchy lap close to his 600 times?

It's going to make an interesting VMCC Bridgestone series with all these 300s on the go. Is it four now???

[Sketchy_Racer]

The question is can Sketchy lap close to his 600 times?


HAHAHAHHHHAAHAHA HAHA HA!

You're a funny bugger aren't you ;)

[Sketchy_Racer]

Nitrous bottle brackets :devil2:

Shhhsssh Don't give away all my secrets!

[Shaun Harris]

A 300 2 Stroke NSR would be awsome to race, haha any one got a spare one

[richban]

A 300 2 Stroke NSR would be awsome to race, haha any one got a spare one

I can build you one for 12k if you like. Will PM you my account details. 80hp 110kg ok with you? 15K if you want a lighter one with more power.

[Autech]

Got another F3 beast in my shed. NC30 this time, VFR's are the mutts nutts. Needs a bit of work but thats the fun part right?

[quickbuck]

Got another F3 beast in my shed. NC30 this time, VFR's are the mutts nutts. Needs a bit of work but thats the fun part right?
Judging on "Feedback" I have received while trying to organise a race series, not everybody would agree with you......

I do point out that one particular NC30 managed to give plenty of 600's the Learn last season... So, year, for good ol' 4 Stroke Honda reliability, it is an awesome place to start.....

[Shaun Harris]

I can build you one for 12k if you like. Will PM you my account details. 80hp 110kg ok with you? 15K if you want a lighter one with more power.


sweet way to easy

[Autech]

Judging on "Feedback" I have received while trying to organise a race series, not everybody would agree with you......

I do point out that one particular NC30 managed to give plenty of 600's the Learn last season... So, year, for good ol' 4 Stroke Honda reliability, it is an awesome place to start.....

"Feedback" I am always eager to hear from experienced chaps, do tell...

Thats what I am after really, reliability with a good handling platform. NC24 is alright but the tyre choice is dismal so I decided to go ahead and get myself an NC30 rather than pissing around on the 24 for too long. Most my racing will still be in Pre '89 where it should be nice n competitive but hopefully if I ride it well enough eventually (I'm slow) it should do me alright in club level F3.

[mr bucketracer]

"Feedback" I am always eager to hear from experienced chaps, do tell...

Thats what I am after really, reliability with a good handling platform. NC24 is alright but the tyre choice is dismal so I decided to go ahead and get myself an NC30 rather than pissing around on the 24 for too long. Most my racing will still be in Pre '89 where it should be nice n competitive but hopefully if I ride it well enough eventually (I'm slow) it should do me alright in club level F3.at least your doing it the hard way not this easy 2 stroke pofter way out

[sil3nt]

"Feedback" I am always eager to hear from experienced chaps, do tell...

Thats what I am after really, reliability with a good handling platform. NC24 is alright but the tyre choice is dismal so I decided to go ahead and get myself an NC30 rather than pissing around on the 24 for too long. Most my racing will still be in Pre '89 where it should be nice n competitive but hopefully if I ride it well enough eventually (I'm slow) it should do me alright in club level F3.I suggest you join this group if your on FB and haven't already:
https://www.facebook.com/groups/5345627304/?fref=ts

Lot's of knowledgeable people there. Jason Hulme posts there every now and then and he has a very well sorted Pre 89 NC30 https://www.youtube.com/user/sera56jase/videos

[richban]

at least your doing it the hard way not this easy 2 stroke pofter way out

Ha ha funny. Its only easy now after almost 2 years of development. You should know you helped.:msn-wink:

[Bert]

at least your doing it the hard way not this easy 2 stroke pofter way out

Seems as you (and steamroller) won't post photos of the GPR400 V4s.
Here's one to start the conversation
310977

And the other getting some dyno love

http://youtu.be/anRwyl1UpEU

[Sketchy_Racer]

Man that thing sounds like a Motogp bike, sounds awesome!!!

[speights_bud]

Sounds sweet. Nice pipes too.

Seeing it run with no straps on the rear wheel reminded me there is no way you can run the old Manx up on the dyno like that. We left them off once and it smoked up in 4th gear with a 70kg rider astride it, completely different of course being a 500 single...

[Pumba]

........with a 70kg rider astride it.......

There is your problem right there:whistle:

[Grumph]

Sounds sweet. Nice pipes too.

Seeing it run with no straps on the rear wheel reminded me there is no way you can run the old Manx up on the dyno like that. We left them off once and it smoked up in 4th gear with a 70kg rider astride it, completely different of course being a 500 single...

The blown 500 Kawa twin would smoke a Michelin slick on a 5.5inch marvic....tied down as hard as we could get it.
Now if i could only have kept the water inside it....

[mr bucketracer]

Sounds sweet. Nice pipes too.

Seeing it run with no straps on the rear wheel reminded me there is no way you can run the old Manx up on the dyno like that. We left them off once and it smoked up in 4th gear with a 70kg rider astride it, completely different of course being a 500 single...i'v hd a 160hp superbike on it with no straps and it fine after the 3thd 4th run , had max singles on my old dyno jet and was fine , maybe im just fat )-;

[Bert]

Sounds sweet. Nice pipes too.

Seeing it run with no straps on the rear wheel reminded me there is no way you can run the old Manx up on the dyno like that. We left them off once and it smoked up in 4th gear with a 70kg rider astride it, completely different of course being a 500 single...

There are straps on it.


i'v hd a 160hp superbike on it with no straps and it fine after the 3thd 4th run , had max singles on my old dyno jet and was fine , maybe im just fat )-;

Just fat heeheeee!!!:facepalm:

[Sketchy_Racer]

Starting to look like a proper race bike now. Still a long way to go yet though!

[Shaun Harris]

Starting to look like a proper race bike now. Still a long way to go yet though!



Looking good, love the colour scheme

[richban]

Here is mine. Now sporting a giant mack truck like radiator.

Currently in the trailer and ready to race.

311143

[sil3nt]

Do the 300s just boost midrange or are they significant top end improvements?

[richban]

Do the 300s just boost midrange or are they significant top end improvements?

All depends on what you are comparing them to. But good power everywhere. Most of the gains are in the mid where you need it most. But still way healthy up top. The best they are ever likely to achieve with the over square engine config is a very fat 85 - 87 at the wheel. So basically the closest you will get to a proper GP bike, But it will run happy for a season before a top end rebuild. (if you do it right that is)

[allribs]

All depends on what you are comparing them to. But good power everywhere. Most of the gains are in the mid where you need it most. But still way healthy up top. The best they are ever likely to achieve with the over square engine config is a very fat 85 - 87 at the wheel. So basically the closest you will get to a proper GP bike, But it will run happy for a season before a top end rebuild. (if you do it right that is)

Hell,power to weight is very healthy,that car radiator might cost you a few hp

[allribs]

Heres a naked picture of mine,around a 100hrs of fabrication to squeeze the 450 in.
Lots of little teething problems but becoming very rewarding now.

[Grumph]

All depends on what you are comparing them to. But good power everywhere. Most of the gains are in the mid where you need it most. But still way healthy up top. The best they are ever likely to achieve with the over square engine config is a very fat 85 - 87 at the wheel. So basically the closest you will get to a proper GP bike, But it will run happy for a season before a top end rebuild. (if you do it right that is)

Rich, I remember the NSR's in 250 prod - and how short a time the cranks lasted. And that parts weren't available separately. A new crank was i think about $1250. What's changed ?

[richban]

Rich, I remember the NSR's in 250 prod - and how short a time the cranks lasted. And that parts weren't available separately. A new crank was i think about $1250. What's changed ?

Whats changed! Maybe we know a little more now. Also these don't rev past 12k. The cranks seam rather good from my eye. You can buy the bearings again now. But also there are cranks available out of japan from Dogfight racing. Mine has unknown road K's on it and still going strong. I will be ordering a dogfight version when the cash is there. Also the pistons we are using are quite a bit lighter the the very heavy oem 250 versions. The good thing is the bottom end can cope well with the extra togue and topend power. Only bitch is first gear, But that can be fixed.

[richban]

Heres a naked picture of mine,around a 100hrs of fabrication to squeeze the 450 in.
Lots of little teething problems but becoming very rewarding now.


Love your this thing. Looking forward to seeing it on track next weekend Mr Tidman. The car radiator works on 2 fronts. Puts more weight over the front and stops me hp from escaping when she gets hot. yes it is big. But it works.

[richban]

Hell,power to weight is very healthy,that car radiator might cost you a few hp

We are not quite there with those HP numbers. But very close:msn-wink:

[chrisc]

There were some bloody good superlite battles yesterday at Hampton. Didn't see you there Leigh? Grant Dalton and I had a slog fest! I wish I new how many times we swapped places. Bloody good racing. I'm uploading photos my old man took tonight, will post a link.

[chrisc]

AMCC Club Series R5 - April 2015

I've just put up the photos from yesterday's racing at round 5 of the Auckland Motorcycle Club series. The photos are mainly of the Superlite and Clubman racing but there are others there too. There's also a short race report from myself if you're after a read from an excitable 125GP rider.

Click here: grandprixmachine.com (http://www.grandprixmachine.com/)

As always, feel free to use and share the images for private use. Please if you wish to use them for commercial use, contact me first.

[Sketchy_Racer]

Locked and loaded ready for manfeild.

Let the fun begin!

[steveyb]

Tomorrow, tomorrow, tomorrow yaaaaaayyyyy

[mr bucketracer]

Tomorrow, tomorrow, tomorrow yaaaaaayyyyyso you went out to make fools of everyone (-; very good riding old chap:2thumbsup

[richban]

so you went out to make fools of everyone (-; very good riding old chap:2thumbsup


Yeah was good fun having a battle with the Doctor! Dr Bagshaw that is. Was good to see the pretender GP bike was up to pace with a proper GP bike. Best not get any faster Steve if you want GP 250's legit for F3.:innocent:

[Bert]

Tomorrow, tomorrow, tomorrow yaaaaaayyyyy


Yeah was good fun having a battle with the Doctor! Dr Bagshaw that is. Was good to see the pretender GP bike was up to pace with a proper GP bike. Best not get any faster Steve if you want GP 250's legit for F3.:innocent:

Have to say, those were my thoughts too...
Great to see all the two strokes out there, looked like you all had a barrel of fun.

[steveyb]

Good times. I think I probably had 1 more sec in me with a bit more track time, right lines, shorter braking zones and some more carrots to chase.
10kg+ off the belly would be worth another sec.
Correct gearing and rear spring might be worth another 0.5 s
But good times.
RichBans bike was the only one left standing at the end of the day!!

[Shaun Harris]

Did not see the racing, but keep those 2 strokes coming folks

[Bert]

Good times. I think I probably had 1 more sec in me with a bit more track time, right lines, shorter braking zones and some more carrots to chase.
10kg+ off the belly would be worth another sec.
Correct gearing and rear spring might be worth another 0.5 s
But good times.
RichBans bike was the only one left standing at the end of the day!!

I was thinking more like 20kgs :bleh:
I'll have to start rethinking the TZ in a glass box idea. Looked sooooo much fun.

The NSR300s are a cool bit of kit, producing really good speeds (a few silly issues ending the fun for some).

[Shaun Harris]

I was thinking more like 20kgs :bleh:
I'll have to start rethinking the TZ in a glass box idea. Looked sooooo much fun.

The NSR300s are a cool bit of kit, producing really good speeds (a few silly issues ending the fun for some).



What is a complete NSR300 Kit worth to buy if some one was interested in building one up?

[richban]

What is a complete NSR300 Kit worth to buy if some one was interested in building one up?

I think landed 2.6k NZ. Then you would need an igntech and better hi comp inserts. So 3k on top of a very strong bottom end should do it. Oh and then you will need pipes so add another 800 to a grand unless you make them yah self.

There are some good rumours on the go as to who else is building them. I started one. His name rhymes with cloud. But its not true. But I did try and plant the seed on Sunday.

[chrisc]

Anyone catch up with Leigh about his RS450? I heard the engine ate itself?

Bloody good racing over the weekend! The VMCC series definitely has my vote, there were so many races and not all of them were even run!
Photos and race report up tonight. I'm dooling over a NSR300 now after the weekend, damn my wallet can only handle so much. :sweatdrop

[scracha]

Anyone catch up with Leigh about his RS450? I heard the engine ate itself?

It looked that way. I suggested he borrowed Russel Forrest's "wet" FZR but he didn't like the idea. As it happened, Russel got sent home early anyway lol. Makes a change me not being the naughty boy.

[Sketchy_Racer]

Weekend of ups and downs for me, although as to be expected for it's first run on the track!

Started to get the feel for it in the last race I did, really think these things have potential for some good lap times!

Scratcha. what happened for Russel to get sent home???

[chrisc]

Click here for a race report from me: http://www.grandprixmachine.com/blog/2015/5/5/vmcc-2015-r1
and click here for the full album of photos - taken by Simon Cain, processed by myself. https://www.flickr.com/photos/sonscc/sets/72157651896760657/

Tell your mates if you see them and share the photos around. Please, they are free to everyone for personal use but contact me first if you wish to use them for commercial purposes. Enjoy

[Neal]

http://nsr250.freeforums.org/nsr300-barrels-t189.html

These were my 300 barrels for sale , we made a deal on the custom 300 pipes that Neels made for me .
After you have raced a decent 300 , all the other proddy 250's will feel as tho it has dropped a cylinder :msn-wink:

[Shaun Harris]

Cheers for the info. It would be very cool to race a 300 2 stroke

[Autech]

Cheers for the info. It would be very cool to race a 300 2 stroke

It would, but I have only just got past the fall out from my 2nd VFR purchase I made recently. Trying to see if I can get a bucket into the garage without her noticing...

New purchase is a 1989 NC30, should be up and running for summer with a bit of attention to detail and some loving. Can't wait to see how she compares to my NC24 in handling/power/awesomeness. Racing the NC24 this weekend in CAMS pre '89 F3, hoping to not come last :)

[Bert]

It would, but I have only just got past the fall out from my 2nd VFR purchase I made recently. Trying to see if I can get a bucket into the garage without her noticing...
)

Paint them all the same colour and cycle them around the shed and undercover. Mine can't seem to count past 2...:lol:

[MOTOXXX]

Paint them all the same colour and cycle them around the shed and undercover. Mine can't seem to count past 2...:lol:

Yep,
the guy from Auckland who bought my Zxr450 said he paints his all White with a red number board. His mrs cant differentiate between them all and cycles them through his garage / storage lockups.

[TALLIS]

Yep,
the guy from Auckland who bought my Zxr450 said he paints his all White with a red number board. His mrs cant differentiate between them all and cycles them through his garage / storage lockups.
This idea dose work, as I have tried and tested. It's only when the little Fulla (who maybe 2 but has a better idea of which bike is which) spills the beans to this wife....:brick:

[allribs]

Anyone catch up with Leigh about his RS450? I heard the engine ate itself?

Bloody good racing over the weekend! The VMCC series definitely has my vote, there were so many races and not all of them were even run!
Photos and race report up tonight. I'm dooling over a NSR300 now after the weekend, damn my wallet can only handle so much. :sweatdrop

Haa no it didn't eat anything,just need to replace parts a little more often,nothing serious.
Even though I only did qualifying I still enjoyed me day,cool new classes and catching up with everyone.

[steveyb]

I shoulda got you to race my IMD250!!!

[Askor]

Well, according to the doctor I'm not allowed to race for 6 months :crybaby: in the mean time I'm considering building an F3 bike from a half complete NC30 I've acquired from Autech (in exchange for helping him with his NC30). Since my racing background is in F4 and I love fucking with bikes I'm hoping to cobble something together and make a real frankenstein of a bike. Currently it has a frame, complete rear end, triple clamps, electrics, tank, some front brake components and most of a molested looking engine in pieces. I'll probably end up putting a different motor in it if I can't find cheap parts for the stock one.

First things first! It needs a front end. Who has some 41mm conventional forks they'd sell me :niceone:

I'm hoping to end up using a 17" rim on the front, I've heard it's possible to use the front end from a completely different bike by swapping out the clamp stems with a press?

Give me your advice and opinions guys.


*generic I'm a poor uni student line*

[sil3nt]

Well, according to the doctor I'm not allowed to race for 6 months :crybaby: in the mean time I'm considering building an F3 bike from a half complete NC30 I've acquired from Autech (in exchange for helping him with his NC30). Since my racing background is in F4 and I love fucking with bikes I'm hoping to cobble something together and make a real frankenstein of a bike. Currently it has a frame, complete rear end, triple clamps, electrics, tank, some front brake components and most of a molested looking engine in pieces. I'll probably end up putting a different motor in it if I can't find cheap parts for the stock one.

First things first! It needs a front end. Who has some 41mm conventional forks they'd sell me :niceone:

I'm hoping to end up using a 17" rim on the front, I've heard it's possible to use the front end from a completely different bike by swapping out the clamp stems with a press?

Give me your advice and opinions guys.


*generic I'm a poor uni student line*NC30 always had a 17" front. Its a 17" rear that you really need!
Several options for front end conversions..
Daytona 675
ZXR 400
NC35
Ducati 748/749/916/996/998/999

http://www.400greybike.com/forum/viewtopic.php?f=22&t=47595
http://www.400greybike.com/forum/viewtopic.php?f=24&t=45883
http://www.400greybike.com/forum/viewtopic.php?f=22&t=32713

So many threads on 400 greybike about front end conversions I can't list them all!

[Askor]

NC30 always had a 17" front. Its a 17" rear that you really need!
Several options for front end conversions..
Daytona 675
ZXR 400
NC35
Ducati 748/749/916/996/998/999

http://www.400greybike.com/forum/viewtopic.php?f=22&t=47595
http://www.400greybike.com/forum/viewtopic.php?f=24&t=45883
http://www.400greybike.com/forum/viewtopic.php?f=22&t=32713

So many threads on 400 greybike about front end conversions I can't list them all!

Awesome! I did see some early NC30 forks in 'average' condition for $250 recently, that seemed a wee bit expensive though considering they're the inferior fork and only in 'average' condition...I mean I just sold some 'average' inverted cartridge kdx250 forks for $80

[Drew]

Has the route been taken, of changing suspension and geometry on an MX bike?

The good shit is all ready there, it just needs a bit of fucking about to make it road oriented rather than dirt.

[speights_bud]

Yea its been done, rode against a 450 dropped and road-modded at Manfeild and wangas. Seemed to go ok, but you never know until you ride it I suppose.

Don't the Americans do 450 super mono or something which is mx chassis based?

[Drew]

Yea its been done, rode against a 450 dropped and road-modded at Manfeild and wangas. Seemed to go ok, but you never know until you ride it I suppose.

Don't the Americans do 450 super mono or something which is mx chassis based?

Yeah bro. You can buy kits to go with a bike that includes a fairing and everything.

The chassis is every bit as good as an RS, seems like an easier way to go.
http://www.450gp.com/EN/

Bit pricey, but can be done cheaper.

[Mental Trousers]

*generic I'm a poor uni student line*

Rules out one of these then

http://zabel-motor.com/en/ZABEL-Engine-uses/

A 700cc 2 stroke would be a ton of fun.

[Askor]

Rules out one of these then

http://zabel-motor.com/en/ZABEL-Engine-uses/

A 700cc 2 stroke would be a ton of fun.

That would be great, too big for F3 though. Max 500cc 2t single.

I've got my finger on the trigger for a gsx400x engine but I dont think I'll be able to make it fit in the NC30 frame. Had a bike with the gsx400x engine in it before (gsxr250 frame), it was solid and sounded great

[allribs]

I shoulda got you to race my IMD250!!!

ohh bugga,would have been keen to have a spin on that,we will have to have a swap one day.

[Grumph]

That would be great, too big for F3 though. Max 500cc 2t single.

I've got my finger on the trigger for a gsx400x engine but I dont think I'll be able to make it fit in the NC30 frame. Had a bike with the gsx400x engine in it before (gsxr250 frame), it was solid and sounded great

Pretty sure that won't fit. Ask around for a VF500 motor. I've done one in the past for a F500 speedway car and while they have the usual Honda V4 probs - weight, pisspoor camchain tensioners, oh, and weight...The rules would at least allow you to go to town on it.

Having since woken up, I won't delete this as it shows how senile and prone to altzheimers I'm getting....
How bad is the NC30 motor anyway ? I've also done a VF400F yonks ago with good - and somewhat surprising - results. easier to make radical changes than the NC setup too.

[Askor]

Pretty sure that won't fit. Ask around for a VF500 motor. I've done one in the past for a F500 speedway car and while they have the usual Honda V4 probs - weight, pisspoor camchain tensioners, oh, and weight...The rules would at least allow you to go to town on it.

Having since woken up, I won't delete this as it shows how senile and prone to altzheimers I'm getting....
How bad is the NC30 motor anyway ? I've also done a VF400F yonks ago with good - and somewhat surprising - results. easier to make radical changes than the NC setup too.

The motor that came with it looks like it was disassembled and left outside for a couple of months..safe to say it's fucked. I do have another block, transmission and other misc parts however. It's missing quite a bit though and would cost a wee bit to build up (that's assuming the crank, bearings, trans, and bores I have are all fine in the first place)

Looks like I'm stuck with using a V4 engine unless I do something crazy to the frame, even just looking at it the NC30 frame seems very narrow compared to an I4 bike..

I could go with a 400cc/450cc single, but bare in mind I've got a shoestring budget to work with :brick:

[Grumph]

The motor that came with it looks like it was disassembled and left outside for a couple of months..safe to say it's fucked. I do have another block, transmission and other misc parts however. It's missing quite a bit though and would cost a wee bit to build up (that's assuming the crank, bearings, trans, and bores I have are all fine in the first place)

Never assume anything till someone experienced in restoration work has looked at the wreckage...half of what i've built has arrived here rusty and in boxes.

[Askor]

Never assume anything till someone experienced in restoration work has looked at the wreckage...half of what i've built has arrived here rusty and in boxes.

So there's hope for it yet do ya reckon Grumph? Would you mind if I sent you some detailed pictures of the bits on the weekend?

[Grumph]

So there's hope for it yet do ya reckon Grumph? Would you mind if I sent you some detailed pictures of the bits on the weekend?

Waste of time on dialup, I'd spend the weekend loading them. Better to have a look in person. PM me later in the week.

[Askor]

Waste of time on dialup, I'd spend the weekend loading them. Better to have a look in person. PM me later in the week.

Will do.

In the meantime another KB member has said he has some NC30 bits he's looking to get rid of. Hopefully he has some parts I'll find useful for this bike. It seems to be coming together!!

[steveyb]

Another TZ250 has arrived in NZ from USA.
Hopefully to come racing at VMCC in Sept. Yay!!
(Not mine).
Reasonable prices still to be had in USA if anyone interested.

[chrisc]

Another TZ250 has arrived in NZ from USA.
Hopefully to come racing at VMCC in Sept. Yay!!
(Not mine).
Reasonable prices still to be had in USA if anyone interested.

You talking Chris' one or another? I've been stalking them with interest but without the immediate cashflow. :drool:

[Autech]

You talking Chris' one or another? I've been stalking them with interest but without the immediate cashflow. :drool:

How many kidneys are you currently in possession of?

[steveyb]

Yeah, Chris M.

I suspect that cash is an important ingredient in securing one of those motorsickles.

My mate Dave is after one too (more a Honda than a Yamahaha).

Bloody hell, if we are not careful we could have a full on revival on our hands.....

[Bert]

Yeah, Chris M.

I suspect that cash is an important ingredient in securing one of those motorsickles.

My mate Dave is after one too (more a Honda than a Yamahaha).

Bloody hell, if we are not careful we could have a full on revival on our hands.....

Man, I better get off my ass...

[chrisc]

Please do Bert!

[steveyb]

Nah, he's too lazy!!:Playnice:

Tell ya what Berty germy, just to get the temptation out of your life, I can take off your hands for 1/2 what you paid.
Job done.
You'll be the better for it you know....

[Pumba]

Man, I better get off my ass...

And what? Finish the TZ:facepalm: Or the TZR100:facepalm: What about that sidecar:facepalm: I am sure there are at least two others that I cant think of right now.

There was a conversation at Tok about a bucket side car too..................

[steveyb]

And what? Finish the TZ:facepalm: Or the TZR100:facepalm: What about that sidecar:facepalm: I am sure there are at least two others that I cant think of right now.

There was a conversation at Tok about a bucket side car too..................

Hehehehe, see?
Told ya that ya need shot of it, the TZ that is........
hehehehehe

BTW, gave Dave a whole heap of leads last night, so I am sure he will be getting something in pretty soon.
Choice!!!
It IS a revival!

[richban]

It IS a revival!

Cool. You can bugger off out of F3 then with yah fancy GP bikes. :cool: Kidding. You can run with the street bitches as long as you pull over on the last lap.

[steveyb]

Nyahh nyahh !!!
OK then.
:-)

[richban]

Thought I would dredge the thread.

2 rounds down in the Suzuki Series and some of the best track action has come from the F3 field.

The top 5 bikes are all different, well presented and super fast. 450 singles, 300 V twin 2 stroke, 450 triple, 4 stroke 650 water cooled V twin, and a 750 air cool V twin, I think.

So cool to see the class with big fields. And thats just the North Island. I will try take some pics of said bikes next weekend if I get time.

As you were!

[Drew]

Thought I would dredge the thread.

2 rounds down in the Suzuki Series and some of the best track action has come from the F3 field.

The top 5 bikes are all different, well presented and super fast. 450 singles, 300 V twin 2 stroke, 450 triple, 4 stroke 650 water cooled V twin, and a 750 air cool V twin, I think.

So cool to see the class with big fields. And thats just the North Island. I will try take some pics of said bikes next weekend if I get time.

As you were!

Briggsies Ducati sounds cool till it's out on track, the 2 strokes are for poor people and tend to die, but the others are cool.

[richban]

the 2 strokes are for poor people and tend to die,

sort of like them 3 wheeled things. :whistle:

[Mental Trousers]

2 rounds down in the Suzuki Series and some of the best track action has come from the F3 field.

The top 5 bikes are all different, well presented and super fast. 450 singles, 300 V twin 2 stroke, 450 triple, 4 stroke 650 water cooled V twin, and a 750 air cool V twin, I think.

That's right. Leigh Tidman on the 450cc single in an RS125 GP chassis, Sketchy on the 300cc NSR, Jacob Stroud on Greg Percival's R6 450 triple, Gavin Veltmeyer on a monster SV650 and Steve Bridges on the 750cc Ducati in a home made chassis.

One of the best classes to watch as these bikes all have different strengths and weaknesses as do the riders, but they're fully elbows out, 3 wide racing the full race distance.

This series has been a wonderful example of how good the F3 class can be.

[Shaun Harris]

That's right. Leigh Tidman on the 450cc single in an RS125 GP chassis, Sketchy on the 300cc NSR, Jacob Stroud on Greg Percival's R6 450 triple, Gavin Veltmeyer on a monster SV650 and Steve Bridges on the 750cc Ducati in a home made chassis.

One of the best classes to watch as these bikes all have different strengths and weaknesses as do the riders, but they're fully elbows out, 3 wide racing the full race distance.

This series has been a wonderful example of how good the F3 class can be.



Gavin Veltmeyer Chassis is super sexy. I Love it and want a ride on it

[chrisc]

Leigh, what happened to your engine mate. I heard through the grape vine it shit itself?

[allribs]

Leigh, what happened to your engine mate. I heard through the grape vine it shit itself?

Yeah sure did,we were blowing about how reliable its been before my first race at cemetery.
First lap boom,broke a rod and made a huge mess.
So one of those learning curves,stronger rod next time.
So looking for another 05-06 WR engine if anyone knows of one

[mr bucketracer]

as long as no one moans about it my f3 bike is all but finshed , im fat and old so no threat but should be fun
https://youtu.be/llykuVuMuiY

[mr bucketracer]

318790here it is , gpr nsr300 tyga kit

[richban]

318790here it is , gpr nsr300 tyga kit

Custom F3 Goodness. Can't wait to ride it!

[mr bucketracer]

Custom F3 Goodness. Can't wait to ride it!death trap:wings:

[Mental Trousers]

318790here it is , gpr nsr300 tyga kit

That's gorgeous. Be good to see it charging around on track. Which race days are you going to do on it?

[mr bucketracer]

That's gorgeous. Be good to see it charging around on track. Which race days are you going to do on it?prombley the vic round , hope i dont start a new project and forget about it lol

[chrisc]

Thread revival!

Rich, your bike making over 100bhp yet?
Leigh, you/your bike still beating skatchy? :Pokey:

I hear there is at least one new 450 in the class and some speak of more 300 2 bangers?
Any of you NSR300 boys gonna do the 2017 NZSBK series?

[Drew]

Spoke to Chappy today. Being allowed to drop the factory airbox seems to have really made a difference to power output.

[Bert]

Thread revival!

Rich, your bike making over 100bhp yet?
Leigh, you/your bike still beating skatchy? :Pokey:

I hear there is at least one new 450 in the class and some speak of more 300 2 bangers?
Any of you NSR300 boys gonna do the 2017 NZSBK series?

Maybe you should get your ass down and check out all the cool F3s on offer. Your 125 is allowed out.

[Grumph]

Spoke to Chappy today. Being allowed to drop the factory airbox seems to have really made a difference to power output.

Now that surprises me. Is he using any airbox at all ?

[Drew]

Now that surprises me. Is he using any airbox at all ?

At the minute he's got the top chopped off the standard air box to expose the whole filter element. He says with the whole thing off its more power right through the tacho.

[mr bucketracer]

At the minute he's got the top chopped off the standard air box to expose the whole filter element. He says with the whole thing off its more power right through the tacho.the colt cams made it work

[richban]

Thread revival!

Rich, your bike making over 100bhp yet?
Leigh, you/your bike still beating skatchy? :Pokey:

I hear there is at least one new 450 in the class and some speak of more 300 2 bangers?
Any of you NSR300 boys gonna do the 2017 NZSBK series?


Good man. 100hp. Yeah Nah! At the crank maybe!

I won't do nationals. To much other stuff on. Some of the other boys might. There are now 6 NSR300's We just have to all turn up on the same day.

I reckon F3 will be the biggest class at Suzuki series. Pity we don't get on the TV.

[neil_cb125t]

Good man. 100hp. Yeah Nah! At the crank maybe!

I won't do nationals. To much other stuff on. Some of the other boys might. There are now 6 NSR300's We just have to all turn up on the same day.

I reckon F3 will be the biggest class at Suzuki series. Pity we don't get on the TV.

Seems when you get near 100hp at the wheel your can run the risk of snapping cranks shafts.......one day ill actually NOT have bad luck.....

[Drew]

Seems when you get near 100hp at the wheel your can run the risk of snapping cranks shafts.......one day ill actually NOT have bad luck.....
That's shithouse bro.

On a side note, your chums from the base don't give many fucks about traffic approaching at 100kph when a line of them is pulling out. The first one was cheeky, the fourth one very nearly had my van in his lap.

[neil_cb125t]

That's shithouse bro.

On a side note, your chums from the base don't give many fucks about traffic approaching at 100kph when a line of them is pulling out. The first one was cheeky, the fourth one very nearly had my van in his lap.

Hmmm yeah the 1630 base traffic jam is crap....people cant merge for crap.

[Drew]

Hmmm yeah the 1630 base traffic jam is crap....people cant merge for crap.

Being it up next health and safety meeting for me champ.

[Grumph]

Seems when you get near 100hp at the wheel your can run the risk of snapping cranks shafts.......one day ill actually NOT have bad luck.....

Where'd it break ? The earlier 500 twin had a torsional vibration problem which made them break inner end of the L/H big end pin. If you ran a lightened ignition rotor rather than the heavy alternator, it didn't happen as the natural resonance frequency was raised...And we ran them to 13 grand.
From observation the later 650 has parts packed so close that you break something you'll pretty well write the motor off.

[neil_cb125t]

I havent stripped it down yet - looks like on the right hand side of no.2 big end. Its running no flywheel but standard balance shaft. Once we get it apart we'll find out what else is broken, at this stage it doesnt look that bad......hopefully.


Where'd it break ? The earlier 500 twin had a torsional vibration problem which made them break inner end of the L/H big end pin. If you ran a lightened ignition rotor rather than the heavy alternator, it didn't happen as the natural resonance frequency was raised...And we ran them to 13 grand.
From observation the later 650 has parts packed so close that you break something you'll pretty well write the motor off.

[chrisc]

1997 Yamaha TZ125 with a WR450 4 banger in it for sale in Oita, Japan at the moment:
http://page18.auctions.yahoo.co.jp/jp/auction/w146675944

http://auctions.c.yimg.jp/images.auctions.yahoo.co.jp/image/ra173/users/2/8/2/7/etoumasayuki-img538x599-1469941819cftlci12248.jpg

[F5 Dave]

That'd be just the business with, say, an RS125 engine in it.

[chrisc]

Super good racing on Sunday. Skatchy got 2 wins from Leigh's 1 despite being sick as a dog. Was awesome trying to keep up on the 125 but I couldn't even get close finishing 5th best. Solid field of 26 and a well run HMCC event, niiiiiiiiice.

https://c7.staticflickr.com/9/8899/29335886510_0d8e14321c_b.jpg (https://flic.kr/p/LGj61J)
_MG_1353 (https://flic.kr/p/LGj61J) by Chris Cain (https://www.flickr.com/photos/sonscc/), on Flickr

[richban]

Sounds like good fun was had. I think the F3 field will be rather large this years at Suzuki Series. Are you going to race your 125 Chris?




Super good racing on Sunday. Skatchy got 2 wins from Leigh's 1 despite being sick as a dog. Was awesome trying to keep up on the 125 but I couldn't even get close finishing 5th best. Solid field of 26 and a well run HMCC event, niiiiiiiiice.

https://c7.staticflickr.com/9/8899/29335886510_0d8e14321c_b.jpg (https://flic.kr/p/LGj61J)
_MG_1353 (https://flic.kr/p/LGj61J) by Chris Cain (https://www.flickr.com/photos/sonscc/), on Flickr

[Southern scratcher]

I started racing F3 at Teretonga this year and am really enjoying it.
I picked up a '94 GSXR400 last winter. Its been converted to a track bike previously and the motor seems sound. Ive fitted racetech front springs and a rear shock out of a '07 GSXR600 to tidy up the handling a bit.

I know I will never be truly competitive on this bike but its loadsa fun to ride and learn to race on, oh and the price was right. :D
We usually have a good amount of bikes on the start grid as they lump F3 together with motards down here.

After three rounds of the Southland cup I'm third in the points but that's only because they seem overly generous with points for finishing and only two of us have completed all nine races.

Looking forward to the last two rounds.

[chrisc]

Sounds like good fun was had. I think the F3 field will be rather large this years at Suzuki Series. Are you going to race your 125 Chris?

Might do a round but I'm focused on the nationals. Making sure the bike is running strong and I'm in the groove for that is all that matters to me