250 production class rules?

[Aeromo]

Can anyone tell me why the 250 production class is limited to two cylinders?

[scott411]

Can anyone tell me why the 250 production class is limited to two cylinders?

because there not been 4 cylinder 250 bikes officially imported into NZ in a long time (if ever), so determining what 'production' was on JDM spec 4 cylinder bikes where no english manuals were made was just too hard,

also there were a shit load of Ninja 250's and Hyosung 250 twins being sold at the time the rules where brought in, making it the perfect bikes to make a series out of,

[steveyb]

I had thought that the single cylinder bikes (CBR250) were eligible also, but perhaps not?
On paper they might be competitive due to lower weight, but in reality that is unlikely.

[Yow Ling]

Here are the rules , you know , just in case you need to read them

http://www.mnz.co.nz/docs/default-source/rules/46---appendix-i---250-production.pdf?sfvrsn=2

1 and 2 cylinders keeps the field pretty even, but not so even that 1 cylinder bikes would have a chance, even the Hyo's couldn't cut it with the ninjas

This has led to an almost one model class which is pretty good to watch and probably good for the sport , 125's are probably better but that's another discussion

4 cylinder 250s would clean up with good riders , can always ride them in clubmans.

Even development class wont take 4clylinedr 250s

[Aeromo]

Sweet, thanks for that, makes sense.
Were development rules changed a few years back? as I bought a MC22 about 8 months ago and the lady said she raced it in development 2012. Now I see it is also limited to two cylinder.
What is clubmans?

[steveyb]

250cc 4 cylinder bikes were/are allowed to enter at Vic Club events in their own class, unless the numbers are now low so that the class is off the menu. (I think that is the case). I am not sure that is the case for other clubs, but you would need to ask. I would think that you can enter it in clubmans class at any club.

[ducatilover]

Does anyone use the trusty ol' VTR250s in the twins class? Cheap enough if they're crashed and easy to cheat with and make moar powah
I imagine the Spada is not allowed now, because it's 40hp, but so was the twin disk GPZ/X250. The Spada was never NZDM either, and I doubt the twin disk GPZ/X was.

[scott411]

the GPX250 was legal, but not sure about the twin disc ones, they are a bit lighter than the newer ninja 250 but the 18" rear wheel made tyre choice harder

[sil3nt]

the GPX250 was legal, but not sure about the twin disc ones, they are a bit lighter than the newer ninja 250 but the 18" rear wheel made tyre choice harderGPX was 16" front and rear.

[ducatilover]

Could make an interesting bike in the class then? You could run sport demons on it \, or Birdgies. Would go quite well.
Especially compared to the whale Hyosungs, mine touched fairings down on the road with pilot powers on it :facepalm:

[Aeromo]

Could make an interesting bike in the class then? You could run sport demons on it \, or Birdgies. Would go quite well.
Especially compared to the whale Hyosungs, mine touched fairings down on the road with pilot powers on it :facepalm:

Are sport Demons any good?

[ducatilover]

Are sport Demons any good?

They're adequate for a smaller bike with shit suspension and they come in pretty much any size

[sil3nt]

Could make an interesting bike in the class then? You could run sport demons on it \, or Birdgies. Would go quite well.
Especially compared to the whale Hyosungs, mine touched fairings down on the road with pilot powers on it :facepalm:I remember suggesting the GPX as a bike to run in the class when I had one a few years ago. People said it would be too slow. From what I hear they have better top end the new ninjas but that could be bs. I think ground clearance would be an issue with the pegs as I remember them being rather low. Sadly the bike got stolen before I got a chance to take it on track.

[ducatilover]

I remember suggesting the GPX as a bike to run in the class when I had one a few years ago. People said it would be too slow. From what I hear they have better top end the new ninjas but that could be bs. I think ground clearance would be an issue with the pegs as I remember them being rather low. Sadly the bike got stolen before I got a chance to take it on track.

I've ridden a twin disk and it had a little more pull than the newer ones, it'd be bloody cheap to get and run one though. Which is what I'm all about

[Bert]

250cc 4 cylinder bikes were/are allowed to enter at Vic Club events in their own class, unless the numbers are now low so that the class is off the menu. (I think that is the case). I am not sure that is the case for other clubs, but you would need to ask. I would think that you can enter it in clubmans class at any club.

VMCC still have the miniLite class (catering for 4cylinder 250). Due to low numbers last couple of years - VMCC are considering removing club championship status, but still allowing them in the development class...

More info on the VMCC FB page or website.

[quickbuck]

We have had a GPX run in 250 Production, as well as a Spada... Not sure if the Spada was totally legal, but it wasn't nationals so who really cared?
Yes, the older Japanese Twins had more power....

The Newer ones had better wheel sizes....
The Ninja was the one to get alright, and it was a BLAST running it for 3 seasons.

As for the 4 Cylinder 250's, year, a bit more power than the Twins, and as Scott said they aren't actually a Homologated Model in NZ.
Vic Club do have a MiniLite Class they fit in and they go well. The Class hasn't really been dropped, it is just that they will run in Junior Clubmans for this season.

Junior Race Class for this season is for Street Stock 150, Hyosung Cup Bikes and 250 Production Bikes.

I think Hamilton Motorcycle Club are running the same format to Vic Club this year... Well, lets just say Vic Club have Mirrored What Hamilton have done for the past we while.

[puddytat]

Nahhhh, the Spada was a grey import so was not Nationals legal ....but I still had fun on it!

Now would a 44hp single 390 fit the class ?:cool:

[ducatilover]

They raced the 250/4s in nat rounds in the early 90's though didn't they? Crasher would remember, cos he's old.

Spada runs 17s front and rear and takes a 150 on it :2thumbsup it's a shame you can't run them. I think. Would hate to see them all raped and killed, but that's what most people are doing on 'em anyway

RC390 would be a giggle on the track, nobody would whinge if you turned up on one lol

[Aeromo]

We have had a GPX run in 250 Production, as well as a Spada... Not sure if the Spada was totally legal, but it wasn't nationals so who really cared?
Yes, the older Japanese Twins had more power....

The Newer ones had better wheel sizes....
The Ninja was the one to get alright, and it was a BLAST running it for 3 seasons.

As for the 4 Cylinder 250's, year, a bit more power than the Twins, and as Scott said they aren't actually a Homologated Model in NZ.
Vic Club do have a MiniLite Class they fit in and they go well. The Class hasn't really been dropped, it is just that they will run in Junior Clubmans for this season.

Junior Race Class for this season is for Street Stock 150, Hyosung Cup Bikes and 250 Production Bikes.

I think Hamilton Motorcycle Club are running the same format to Vic Club this year... Well, lets just say Vic Club have Mirrored What Hamilton have done for the past we while.


Im new to the sport but im keen to race. I have my 1990 mc22 but that didn't fit into development so I just bought a RG150. Took it to Taupo on the 20th and it went well. I was going to entre the Taupo round of nzsbk but have run out of time to sort club license, just got club membership card in mail. Im in Tauranga, Does wellington club race at manfield? Or whats going to be my best bet to race the RG or the Honda? Hamilton, Auckland or Wellington if they operate out of manfield?

[Shaun Harris]

Im new to the sport but im keen to race. I have my 1990 mc22 but that didn't fit into development so I just bought a RG150. Took it to Taupo on the 20th and it went well. I was going to entre the Taupo round of nzsbk but have run out of time to sort club license, just got club membership card in mail. Im in Tauranga, Does wellington club race at manfield? Or whats going to be my best bet to race the RG or the Honda? Hamilton, Auckland or Wellington if they operate out of manfield?


Wellington club, being the Victoria motorcycle club mainly operates at manfield, but do have rounds at Taupo. And the Hamilton motorcycle club seems to operate more at Hampton downs. The Victoria club in the nth island and the Canterbury club in the sth island seem to be the busiest of the clubs operating. So now you have your club license, apply for your MNZ- www.mnz.co.nz License, and go race where you want to buddy, Best wishes have fun.

[quickbuck]

Im new to the sport but im keen to race. I have my 1990 mc22 but that didn't fit into development so I just bought a RG150. Took it to Taupo on the 20th and it went well. I was going to entre the Taupo round of nzsbk but have run out of time to sort club license, just got club membership card in mail. Im in Tauranga, Does wellington club race at manfield? Or whats going to be my best bet to race the RG or the Honda? Hamilton, Auckland or Wellington if they operate out of manfield?

You still have plenty of time to sort your MNZ Club Licence.
It is still 2 weeks away..... unless it is a money thing....
I fully understand, motorcycle racers are usually broke!

Vic Club (Based in Wellington originally, but half of the committee are from Manawatu, and most members are from all over) are running all their rounds at Manfeild this year.
Sadly not many clubs race at Taupo anymore and it looks bleak for the future sorry to say, but I might be surprised!

Hampton Downs will be your closest track run by Hamilton Motorcycle Club.
That said, as Shaun (Moto-Dynamix) said Vic Club tend to be the most active.
Check out this: www.vicclub.co.nz and https://www.facebook.com/vicclubnz

As for which bike, well totally up to you.
RG will be on the grid against other RG's, as well as GT250R's and Ninja 250 R's... The RG and the Ninja are pretty close to same times around Manfeild.
The 250 will be eligible for MiniLite 250. You can find the rules for that class on the Vic Club site.
This season you will be in 250 Clubmans with a few other CBR's (well at least one other) and a bunch of 250cc powered bucket Racers so the promise goes..... Bert on here knows more about that.

Needless to say the Vic Club welcome new members and we have a programme especially for them.

I am pretty confident the racing in either class will bring a smile to your face.

Oh, and well done for choosing smaller bikes to start on. They go faster than you think!
Big bikes tend to scare or break new racers! They never actually learn how to race either!

I had been riding bikes for 34 years before starting racing on the Ninja 250R.... No shame in starting small.

[Mental Trousers]

I think Hamilton Motorcycle Club are running the same format to Vic Club this year... Well, lets just say Vic Club have Mirrored What Hamilton have done for the past we while.

Other way around. The Hamilton MCC have been running Senior/Intermediate/Junior since they started running a Winter series 2 years ago.

[quickbuck]

Other way around. The Hamilton MCC have been running Senior/Intermediate/Junior since they started running a Winter series 2 years ago.

Yup, that is what I meant... see last part of statement ;)

[Mental Trousers]

Yup, that is what I meant... see last part of statement ;)

Ok, so 2 beers at a late lunch, followed by another couple with the Trades guys and then a Bourbon means I'm only reading (or comprehending) half of what's in front of me :beer: :D

Seeing as I'm nicely on my way, who needs to be banned later on?? :D

[jellywrestler]

I had been riding bikes for 34 years before starting racing on the Ninja 250R.... No shame in starting small.

i rode a 250 single to chch last weekend for mate, hadn't ridden one for 30 soemthing years and enjoyed every minute of it being able to wind it up and work it, instead of these days everytime i get happy having to roll the throttle off... i'm going to try a 250 proddy bike soon just to see what a hoot it'll be.

[quickbuck]

i rode a 250 single to chch last weekend for mate, hadn't ridden one for 30 soemthing years and enjoyed every minute of it being able to wind it up and work it, instead of these days everytime i get happy having to roll the throttle off... i'm going to try a 250 proddy bike soon just to see what a hoot it'll be.

Do it! Heaps of fun.

[Aeromo]

You still have plenty of time to sort your MNZ Club Licence.
It is still 2 weeks away..... unless it is a money thing....
I fully understand, motorcycle racers are usually broke!

Vic Club (Based in Wellington originally, but half of the committee are from Manawatu, and most members are from all over) are running all their rounds at Manfeild this year.
Sadly not many clubs race at Taupo anymore and it looks bleak for the future sorry to say, but I might be surprised!

Hampton Downs will be your closest track run by Hamilton Motorcycle Club.
That said, as Shaun (Moto-Dynamix) said Vic Club tend to be the most active.
Check out this: www.vicclub.co.nz and https://www.facebook.com/vicclubnz

As for which bike, well totally up to you.
RG will be on the grid against other RG's, as well as GT250R's and Ninja 250 R's... The RG and the Ninja are pretty close to same times around Manfeild.
The 250 will be eligible for MiniLite 250. You can find the rules for that class on the Vic Club site.
This season you will be in 250 Clubmans with a few other CBR's (well at least one other) and a bunch of 250cc powered bucket Racers so the promise goes..... Bert on here knows more about that.

Needless to say the Vic Club welcome new members and we have a programme especially for them.

I am pretty confident the racing in either class will bring a smile to your face.

Oh, and well done for choosing smaller bikes to start on. They go faster than you think!
Big bikes tend to scare or break new racers! They never actually learn how to race either!

I had been riding bikes for 34 years before starting racing on the Ninja 250R.... No shame in starting small.


Thanks for the info, I checked out both clubs today, looks like there is lots of racing I can do with the 250. Im going to leave nzsbk taupo round for now, don't want to rush things. Im a tight ars and don't want to pay the late entre fee :wacko: And I think licenses renew end of march so would need to pay for that again in a months time. Need to get some new slicks for the RG, trying to find some used 125gp tyres. The Pirelli tyres on it are crap.

[quickbuck]

Thanks for the info, I checked out both clubs today, looks like there is lots of racing I can do with the 250. Im going to leave nzsbk taupo round for now, don't want to rush things. Im a tight ars and don't want to pay the late entre fee :wacko: And I think licenses renew end of march so would need to pay for that again in a months time. Need to get some new slicks for the RG, trying to find some used 125gp tyres. The Pirelli tyres on it are crap.

Fair enough.

Yeah, forgot about licence renewal time... means mine is due too... Thanks for the reminder.

For Slicks, I am guessing there will be a few for sale in a couple of weeks time that will do.

[ducatilover]

http://www.trademe.co.nz/motors/motorbikes/motorbikes/sports/auction-851110772.htm

Chur, cheap racing

[Yow Ling]

here is the homologation list for proddy racing

http://www.mnz.co.nz/docs/default-source/regulations/homologated-road-race.pdf?sfvrsn=2

[ellipsis]

here is the homologation list for proddy racing

http://www.mnz.co.nz/docs/default-source/regulations/homologated-road-race.pdf?sfvrsn=2


...can't wait to tell the next MV Augusta rider I come across that MNZ consider their bike to be worthy of being a Triumph...:lol:

[Pumba]

Need to get some new slicks for the RG, trying to find some used 125gp tyres. The Pirelli tyres on it are crap.

What class are you going to race the RG in? Welcome to be corrected but I didn't think slicks were allowed in the streetstock class.

[Bert]

What class are you going to race the RG in? Welcome to be corrected but I didn't think slicks were allowed in the streetstock class.

I think your incorrect Pumba. Once streetstock a were dropped in fav of 250production south islanders start allowing slicks. We were a little slow on the north adopting this. But all fine now to use them.
Though I better check our sup rules for this year covers this before committing..

[Pumba]

I think your incorrect Pumba...

All good. Would have hated him to go to that effort to do something that was not allowed

[quickbuck]

I think your incorrect Pumba. Once streetstock a were dropped in fav of 250production south islanders start allowing slicks. We were a little slow on the north adopting this. But all fine now to use them.
Though I better check our sup rules for this year covers this before committing..
Almost... South Islanders made up the "Development" Formula.
It is as below, except the link to AMCC doesn't work but you get the jist of it....Development Formula Rules

Development Class is open to any F4 Miniature Road Race bikes, 250cc 2 cylinder 4 stroke (including Hyosung cup machines) and up to 150cc 2 and 4 stroke street type road registrable mass production machines of any make sold or on sale in New Zealand, in standard specification.


The minimum age limit for Development Class racing shall be:
1.13 years for 150cc 2 and 4 stroke,
2.15 years for 250cc 2 cylinder 4 stroke unless the competitor has a dispensation


Development class shall be a restricted class of road racing, under the following conditions:
1.The maximum 2 stroke engine capacity size is 150cc; re boring to maximum over size of 0.50mm is allowed.
2.The maximum 4 stroke engine capacity size is 250cc up to 2 cylinders maximum over size of 0.50mm is allowed.
3.The motorcycles are not to be 125GP bikes.
4.Where the rider does not have a current driving licence, that rider shall receive motorcycle riding lessons and a minimum of one full days coaching of road racing with an approved coach prior to racing.
5.All junior competitors (17 years and younger) in the road race event are to wear a high visibility vest to be worn over their leathers for the first 10 events at which they compete. Proof of these events will be from entries in their logbook.


MNZ Classes Eligible
1.F4 Miniature Road racing as per MNZ Rules chapter - 24
2.250 Production as per MNZ Rules Appendix - I; with the exception of the tyre rule and homologation


Other Classes Eligible
1.Hyosung Cup Class (Regulations covering these are on the Auckland Motorcycle Club website )
2.All other machines (150cc 2 and 4 stroke street type road registrable mass production machines of any make sold or on sale in New Zealand, in standard specification) must fit the following requirements:


Preparation of Motorcycle
1.All items not mentioned in the following must remain as originally produced by the manufacturer.
2.All motorcycles are to be prepared in accordance with Chapter 10. In instances of wear and tear damage or failure, parts may be replaced but must not derive a performance advantage.
3.Fuel refer to rule 10.17.2
4.All motorcycles must display the manufacturer's vehicle identification number on the frame. Additional seat brackets may be added but none may be removed. Bolt on accessories to the sub frame may be removed.


Modifications or Removal Allowed
1.Footrests/foot controls must bolt on the frame in the original position and be same height and position as standard. Solid footrest are allowed
2.Handle bars height and angle of bars must remain standard
3.Hand controls: clutch and brake levers can be modified.
4.Brake lines and brake pads can be modified.
5.The speedo drive may be removed and replaced with a spacer
6.Fairing, front guard, windscreen and bodywork must retain the original shape as produced by the manufacturer, but these parts can be replaced with an exact cosmetic copy.
7.Carbon fibre is restricted to the reinforcing parts only; carbon fibre cannot be used elsewhere. Small plastic cones/knobs may be added to the machine to minimise accident damage.
8.All exposed edges must be rounded.
9.Seat and seat base and associated bodywork may be replaced with parts of similar appearance as the original shape; the top portion of the seat may be modified to create a solo seat.
10.Fuel lines may be replaced Quick connectors or dry break quick connectors may be used. Fuel line vents may be replaced fuel filter may be fitted.
11.Base and head gasket with standard parts, but must retain original thickness.
12.Carburettor jetting / fuel injection tuning is allowed.
13.External gearing and chains may be changed.
14.Suspension springing and oil may be changed.
15.Fasteners may be drilled for safety wire only. Fairing fasteners may be changed for quick disconnect type. Titanium/aluminium fasteners may not be used.
16.All 4 stroke; standard headers aftermarket mufflers allowed.
17.Rims may be changed, but must be production bike rims. No aftermarket or GP rims allowed.
18.Motorcycle must be equipped with a functional ignition kill switch or button mounted on the handlebars that is capable of stopping a running engine.
19.Where breather or overflow pipes are fitted they must discharge via existing outlets into a catch tank. The original closed system can be retained; no direct atmospheric emission is permitted.
20.Instruments,horn, brackets and associated cables can be removed.
21.Toolbox can be removed.
22.Radiator fan and wiring can be removed.
23.Rear guard / Chain Guard can be removed.


The following items must be removed
1.Passenger footrests / grab rails unbolted only.
2.Number plate / Number plate bracket.
3.Safety bars, centre and side stands (fixed/welded brackets must remain).
4.Headlamp, rear lamp, blinkers.


Items not allowed
1.Data logging not allowed
2.The fitment of aftermarket traction control units is not allowed.
3.Rear shock and all linkages must remain standard modifications not allowed.
4.Tyre warmers are not allowed.
5.Frame Body and rear sub frame modifications not allowed.
6.Emulator valves or modifications to damping mechanisms are not allowed.
7.Aftermarket expansion chambers are not allowed.
8.The inner and outer front fork stanchion must remain standard.


The choice of tyre is optional:
1.Must be commercially available in New Zealand.
2.Be worn no more than the tread depth indicators.
3.In the event of the meeting being declared wet, a treaded tyre MUST be used. Full wet or otherwise.

[budda]

I had thought that the single cylinder bikes (CBR250) were eligible also, but perhaps not?
On paper they might be competitive due to lower weight, but in reality that is unlikely.

Sorry guys, been away for a coupla months ...... the rules allow any single or twin cylinder bike that meets the rest of the criteria AND is homologated by its Importer to compete in this class :confused:

[Aeromo]

All good. Would have hated him to go to that effort to do something that was not allowed

I did get abit confused as I read in the rules (must have been old rules) tyres off the shelf road tyres. But the Supplementary rules for the nzsbk rounds said tyres were open. I got some now. A 125gp front and a continental rear.