I'm going to have another go at F3

[crazy man]

279463been 13 years from when l last raced f3 apart from the odd play ended up with heath promblems. now that l am slower l got to to build a faster bike. + rulzs have changed alot. hopfully my fat ass can handle this little thing. if it turns to shit my brother can take over

[steveyb]

Hmm, where have I seen that before??

Rolling chassis, now the hard part starts!!

Hehehehe

[crazy man]

Hmm, where have I seen that before??

Rolling chassis, now the hard part starts!!

Heheheheyes still heaps of hard work to go but use to it . having a rest from it for abit now

[Drew]

Fuck yeah!

Racing real bikes is where it's at!

[slowpoke]

Give Ducati Corse a ring, they badly need some of your skills!

[codgyoleracer]

Welcome baaaaaack :-)

[neil_cb125t]

279463been 13 years from when l last raced f3 apart from the odd play ended up with heath promblems. now that l am slower l got to to build a faster bike. + rulzs have changed alot. hopfully my fat ass can handle this little thing. if it turns to shit my brother can take over

Get an ER650 motor they are way lighter :crazy:

[steveyb]

Did you take out the crank etc and pump it full of Helium before you weighed it???? :lol:

[crazy man]

Did you take out the crank etc and pump it full of Helium before you weighed it???? :lol:me thinks your saying lm a fatty

[crazy man]

Welcome baaaaaack :-)welcome back as well

[steveyb]

me thinks your saying lm a fatty

Hahahahaha, well, while that might be so, I would never say it to you face, behind your back or to any mates.
Hahaha

I meant Chappy's engine. Should have quoted it.

I thought that the best use of an ER650 engine was as a mooring block.

[Mental Trousers]

An ER650 engine is a better basis for a build than an SV650. But the Aprilia 550 is definitely the lightest, but also the most fragile.

[codgyoleracer]

An ER650 engine is a better basis for a build than an SV650. But the Aprilia 550 is definitely the lightest, but also the most fragile.

I heard that Crazyman was welding together 2 KDX200s for his 400cc 2 stroke powered version.

ER6 is better than an SV you say...................... HaHa, both are built of butter.

[Mental Trousers]

I heard that Crazyman was welding together 2 KDX200s for his 400cc 2 stroke powered version.

Not bad, but I always wanted to take 2x NSR250's and make a V4 :D :D :D

[codgyoleracer]

Not bad, but I always wanted to take 2x NSR250's and make a V4 :D :D :D

Yeah maybe ......... But i know for a fact that Crazyman has some sort of sick Fetish with anything painted green

[bistard]

Yeah maybe ......... But i know for a fact that Crazyman has some sort of sick Fetish with anything painted green

Ha ha Glen, thats not a bad thing is it, I have been accused of that myself, many times

[crazy man]

An ER650 engine is a better basis for a build than an SV650. But the Aprilia 550 is definitely the lightest, but also the most fragile.depends on who builds the engine . starting of stock for starters

[Skunk]

Ha ha Glen, thats not a bad thing is it, I have been accused of that myself, many timesGreen is for Go!
Red means Stop.
Is it a coincidence that Italians like Red and their electrics stop?

[neil_cb125t]

I heard that Crazyman was welding together 2 KDX200s for his 400cc 2 stroke powered version.

ER6 is better than an SV you say...................... HaHa, both are built of butter.

yeah I spent many hours sanding off all the frag from the inside of the cases, it was like they used playdough to make the moulds I swear:baby:

[crazy man]

got the wiring coming but need a fuel pump . anyone got one like a sv650 gsxr type? injector pump

[neil_cb125t]

got the wiring coming but need a fuel pump . anyone got one like a sv650 gsxr type? injector pump

i have a spare ER650 one, in tank

[crazy man]

i have a spare ER650 one, in tanksounds good guess it has a flange with bolt holes to hold it in with only the one fuel out let

[neil_cb125t]

sounds good guess it has a flange with bolt holes to hold it in with only the one fuel out let

yep would that work? also any progress on the new rad for the ER

[GSVR]

An ER650 engine is a better basis for a build than an SV650. But the Aprilia 550 is definitely the lightest, but also the most fragile.

Aprilia 550 would have to be the least fragile I reacon.

Wonder if Crazymans bike will be any different to Jasons. Isn't this building a bike using the most competitive options under the current interpetation of the F3 rules citing previously legal bikes?

[Drew]

Best currently legal F3 motor. A 600 cut down to a triple, with custom crank and cams to fire at 240 degrees. In my opinion anyway. Modern fuel injection and components, would be unbeatable methinks.

[crazy man]

Best currently legal F3 motor. A 600 cut down to a triple, with custom crank and cams to fire at 240 degrees. In my opinion anyway. Modern fuel injection and components, would be unbeatable methinks.kerry dukey did that years ago (-: l think a 450 /4 is still better but needs fuel injection with a nice frame. but a rg400 built right would be the best but l just don't think its the right class for it

[crazy man]

progress is slow with bike ! don't realy have the money to speed it up . 4k max to build with a million hours on top of that

[codgyoleracer]

Best currently legal F3 motor. A 600 cut down to a triple, with custom crank and cams to fire at 240 degrees. In my opinion anyway. Modern fuel injection and components, would be unbeatable methinks.

You need to share a track with Gimpys thing................

[Drew]

kerry dukey did that years ago (-: l think a 450 /4 is still better but needs fuel injection with a nice frame. but a rg400 built right would be the best but l just don't think its the right class for it

There's an engine builder in Auckland who made a screamer R450. Went ok, but when it failed he dropped a slug as a temporary measure till he got another screamer done. Triple went so much better, he has stuck with it.

Two stroke might be the way to go...if you can get through a season without a dnf of course.

[Drew]

You need to share a track with Gimpys thing................

Hahahaha, be a funny betting pool. Won't be who wins, but Will I crash before the stroker blows up.

[Mental Trousers]

Aprilia 550 would have to be the least fragile I reacon.

Ummm, no. Have a look through the Aprilia forums or talk to anyone who's raced one. They're fucken rockets but they're a really high maintenance engine. The early ones had plenty that needed to be done to them. Issues were; blowing oil seal between engine pump & g/box pump, sticky rear decompresser, heads not torqued correctly, stator/rotor bolts coming loose, blowing starter motors (they are really small & burn out if run for ages, updated ECU map lets them run for 6 secs at a time). But the big one - they used an orange sealant (if you can call it that) between the cases and this will eventually fail, mixing coolant and oil followed by a rooted engine. Later models use a black sealant (threebond, yamaha sealabnt etc), a smart move is to split the cases and do it before it fails. Some bikes have gone for ages and other died quickly, If the cases are done, the service intervals are no different to any other bike, just depends on what you using it for.

[crazy man]

There's an engine builder in Auckland who made a screamer R450. Went ok, but when it failed he dropped a slug as a temporary measure till he got another screamer done. Triple went so much better, he has stuck with it.

Two stroke might be the way to go...if you can get through a season without a dnf of course.l look at the triple as been l cheap competitve bike but not the best. intresting to have a poll on all f3 bikes and see what people think is the best to have

[Mental Trousers]

There's an engine builder in Auckland who made a screamer R450. Went ok, but when it failed he dropped a slug as a temporary measure till he got another screamer done. Triple went so much better, he has stuck with it.

Two stroke might be the way to go...if you can get through a season without a dnf of course.

That was Greg Percival. Originally he had a new shorter stroke crank made and used longer conrods. Unfortunately that engine never got anywhere near making peak power because the stroke was so short it needed to do 22,000rpm to flow enough air. So he built another engine as a 3 cylinder and removed the piston and conrod. But he's had a lot of trouble getting it right cos it suffers from a vibration in the crank which gets so bad it whacks the crank speed sensor and stops dead. Although at Hampton Downs they did something more than that cos the crank cases were actually split. I think Chris Osbourne finally got around to removing the piston and conrod from his. However, it's been a whole heap more reliable.

I reckon the way to do it is how Ducati made the Super Mono. They took a twin and lopped a cylinder off but left the conrod in place. Instead of the piston it bolted to an arm, the end of which is a similar weight to the other piston. In the pic below you can see the conrod at the top of the pic attached to the arm.

From Neil Spalding, http://www.superbikeplanet.com/thumper.htm

Ducati applied this very same engineering, literally, with their Supermono, a racebike that was produced in a limited run of 67 units between 1993 and 1995. The bike was literally an 888cc L-Twin with one bored-and-stroked cylinder that yielded 572cc. Both con-rods were still present, but the "vertical" cylinder and head were lopped off and replaced by a pivoting counter-balancer weight


http://tottimotori.blog.tiscali.it/files/2011/04/mono18big.jpg

[Mental Trousers]

l look at the triple as been l cheap competitve bike but not the best. intresting to have a poll on all f3 bikes and see what people think is the best to have

I'd love to do one properly. Pull the piston and replace it as above. Pull the cylinder liner, machine any excess weight out of the cylinder area and head (without weakening them of course) blocking or diverting oil and coolant galleries as needed. Make a custom exhaust (this is where just about all of the current triples are losing power cos a 4-2-1 exhaust has the 4th cylinder scavenging the 3th cylinder so they're not filling the 3rd cylinder properly).

A good solid 600 can put out a reliable 130hp without going pop. Three quarters of that is 97.5hp.

[koba]

Hahahaha, be a funny betting pool. Won't be who wins, but Will I crash before the stroker blows up.

Eh? Gimpy = Jason Easton = Aprilia 550 in tiny Rs sized thing.

[Shorty_925]

A good solid 600 can put out a reliable 130hp without going pop. Three quarters of that is 97.5hp.

Whats the power to weight like after dropping the cylinder to compared to a standard 600?

[Mental Trousers]

Whats the power to weight like after dropping the cylinder to compared to a standard 600?

Less power same weight more grip. What do you mean??

[GSVR]

Ummm, no. Have a look through the Aprilia forums or talk to anyone who's raced one. They're fucken rockets but they're a really high maintenance engine. The early ones had plenty that needed to be done to them. Issues were; blowing oil seal between engine pump & g/box pump, sticky rear decompresser, heads not torqued correctly, stator/rotor bolts coming loose, blowing starter motors (they are really small & burn out if run for ages, updated ECU map lets them run for 6 secs at a time). But the big one - they used an orange sealant (if you can call it that) between the cases and this will eventually fail, mixing coolant and oil followed by a rooted engine. Later models use a black sealant (threebond, yamaha sealabnt etc), a smart move is to split the cases and do it before it fails. Some bikes have gone for ages and other died quickly, If the cases are done, the service intervals are no different to any other bike, just depends on what you using it for.

My definition of fragile is different to yours maybe.

I'm saying its it less fragile because its less likely to have the cases break or fail, throw a rod, drop a valve, etc. Real issues.

Have to get Gimpy in here to tell how many motors he lunched in the years hes been running them.
To my knowlege his main issues were blown head gaskets and overheating. Both have been overcome.

[Drew]

Eh? Gimpy = Jason Easton = Aprilia 550 in tiny Rs sized thing.

Oh right. I thought it was the 400 two stroke thing he was talking about.

[Grumph]

Ummm, no. Have a look through the Aprilia forums or talk to anyone who's raced one. They're fucken rockets but they're a really high maintenance engine. The early ones had plenty that needed to be done to them. Issues were; blowing oil seal between engine pump & g/box pump, sticky rear decompresser, heads not torqued correctly, stator/rotor bolts coming loose, blowing starter motors (they are really small & burn out if run for ages, updated ECU map lets them run for 6 secs at a time). But the big one - they used an orange sealant (if you can call it that) between the cases and this will eventually fail, mixing coolant and oil followed by a rooted engine. Later models use a black sealant (threebond, yamaha sealabnt etc), a smart move is to split the cases and do it before it fails. Some bikes have gone for ages and other died quickly, If the cases are done, the service intervals are no different to any other bike, just depends on what you using it for.

All this used to be normal Italian...you guys have been spoiled in the last few years as Ducati has finally got it's act together. Nothing I see there which can't be sorted by a competent engineer.

[wharfy]

All this used to be normal Italian...you guys have been spoiled in the last few years as Ducati has finally got it's act together. Nothing I see there which can't be sorted by a competent engineer.

Yeah used to be normal - however for the sort of money you have to hand over for a bike now days there is no excuse for the factory to not get it right (or fuckin close).

[wharfy]

Make a custom exhaust (this is where just about all of the current triples are losing power cos a 4-2-1 exhaust has the 4th cylinder scavenging the 3th cylinder so they're not filling the 3rd cylinder properly).

A good solid 600 can put out a reliable 130hp without going pop. Three quarters of that is 97.5hp.

How about diverting the exhaust from the unused cylinder into the air box - supercharger !!! :)