What class will this fit into?

[Henk]

Doesn't need clarification

24.2.1 Solo motorcycles shall have two engine capacity classes:
F4 2 stroke 55-100cc
2 stroke 55-125cc air cooled
4 stroke 55-150cc
F5 2 stroke 0-50cc
4 stroke 0-100cc air cooled


24.2.3 The maximum capacity for rebored engines shall be:
F4 2 stroke 55-100cc - 104cc
2 stroke 55-125cc air cooled - 130.5cc
4 stroke 55-150cc – 158.09cc
F5 2 stroke 0-50cc - 53cc
4 stroke 0-100cc - 104cc

It starts at 155cc so falls outside the rules, simple really.

[Moooools]

Ignoring that it is a competition engine; what say that you bored it out .25 beforeracing it. Would thatmake it within the limits?

[RDjase]

What about this for F5..........................

http://www.thewarehouse.co.nz/red/ca...cc?SKU=1546466

[gav]

Maybe someone should ask the MNZ for a decision or at least a clarification...

Hahaha, good luck with that. Have emailed Peter Ramage before about something else and he pointed at these pit bikes as an example. In his opinion the bike even if it measured 150cc isnt what the rules intended. He's old school and still thinks you should be buying an old shitter and modifying to suit, not buying a bike already to race, isnt in the spirit of the rules, lmao .... But thats just his personal opinion. Trying to get official clarification he suggests self policing ...

So anyway if the bike was offered with a 150cc engine where do you think it would fit?

Note: See he has slightly altered the wording, now suggesting it has potential for Bucket racing.

[bucketracer]

Note: See he has slightly altered the wording, now suggesting it has potential for Bucket racing.

It probably does have potential, its 155cc, and F4 4-Stroke allows re boring to 159cc (159?), so the easy answer to make it legal is to re bore it.

And recently we had Nathanials purpose built 50cc Derbi race bike on here and that was claimed to be legal because it was based on a road legal engine.

The argument went, so long as the motor is derived from a road going unit, everything else can be as purpose built race bike as you like, or $$$$ allow.

So I guess if the Pitsters engine is also used in road going chopper bikes or whatever then its legal ...

[Tard]

Doesn't need clarification

24.2.1 Solo motorcycles shall have two engine capacity classes:
4 stroke 55-150cc

I'm just happy mine is 150cc & 100% within the rules - had lights & everything I don't think I could live with myself racing illegally

[gav]

Yeah well, if a Metrakit which is a purpose built competition race bike can somehow be considered legal because it uses a modified street bike engine, then it's no wonder when pit bikes with over size engines can somehow be considered legal in some people's eyes.

I heard recently that MNZ are to allow F4 bikes to compete with 150 Streetstocks in a support class for the 250 Prolite class at the Nationals.
So thats F4, 150 S/S, 250 Prolites and maybe the 180cc Global Motorsports Yamaha R125's all running on track at the same time.
Thats going to be one big field of bikes !

[Henk]

I heard recently that MNZ are to allow F4 bikes to compete with 150 Streetstocks in a support class for the 250 Prolite class at the Nationals.
So thats F4, 150 S/S, 250 Prolites and maybe the 180cc Global Motorsports Yamaha R125's all running on track at the same time.
Thats going to be one big field of bikes !

they've run prolite ss and F4 together at HD at AMCC club meets, wasn't a problem, what was scary was being on an F4 bike during the newbie look laps at the beginning of the day on track with liter bikes and the like.

[CHOPPA]

Here you go..... For the second time

I have been told there are plenty of people running engines in Bucket racing that are sleeved down so the capacity will fit within the class.

You get the 155 engine and sleeve it down to 150cc then when it needs a hone out for 'maintenance' reasons you bore it out to 155.

[Henk]

Here you go..... For the second time

I have been told there are plenty of people running engines in Bucket racing that are sleeved down so the capacity will fit within the class.

You get the 155 engine and sleeve it down to 150cc then when it needs a hone out for 'maintenance' reasons you bore it out to 155.

Got any examples? I'm guessing you have been told wrong.
I've heard of a few two stroke builds that have odd things done to get under the 100cc water cooled Capacity limit but all of those have started with engines and components that were legal in the first place.

[CHOPPA]

Got any examples? I'm guessing you have been told wrong.
I've heard of a few two stroke builds that have odd things done to get under the 100cc water cooled Capacity limit but all of those have started with engines and components that were legal in the first place.

RG150 with RG400 barrel was one that I was told but several types of builds along those lines.

[Henk]

RG150 with RG400 barrel was one that I was told but several types of builds along those lines.

Pretty much what I thought, started with legal bits.

[gav]

Here you go..... For the second time

I have been told there are plenty of people running engines in Bucket racing that are sleeved down so the capacity will fit within the class.

You get the 155 engine and sleeve it down to 150cc then when it needs a hone out for 'maintenance' reasons you bore it out to 155.

Hahaha, thats gonna be a great sales pitch isnt it? Yep your FXR155Z is legal, but first you need to modify/replace the cylinder and piston before you can race it cos its oversize. But its faster than a standard FXR150 too apparently on a dyno. Shame very few people race a standard FXR150 and its pretty easy and cheap to get a few more hp out of the fixxer. Not too sure the pitster has much more to offer to be honest.

Henk, how many ran at HD? The same classes ran here at King of Ruapuna, 39 riders fronted for first practice session! One race was red flagged twice., and not helped when the NZ Prolite champ crashed in the entry to the dipper and left his bike bleeding to death.

[F5 Dave]

What about this for F5..........................

http://www.thewarehouse.co.nz/red/ca...cc?SKU=1546466

Well they do say 'it isn't a toy'.


- Therefore it is a competition bike & we must BURN IT.


PS good luck with those tyres.

[speedpro]

they've run prolite ss and F4 together at HD at AMCC club meets, wasn't a problem, what was scary was being on an F4 bike during the newbie look laps at the beginning of the day on track with liter bikes and the like.

You would have enjoyed "Clubmans" at Wanganui on Boxing Day riding a bucket. Diving under 1000cc bikes into the esses to have them blast past coming up to "flower garden" and overshoot, and then blast past over the start finish etc etc. More than one had "stern" words with me after a race.