Formula 5 question?

**gav** · 11th November 2011, 15:56

Cheap F5 bike here http://www.trademe.co.nz/motors/moto...-421727438.htm

**Buddha#81:Me** · 11th November 2011, 16:07

F5 motard anyone? http://www.kiwibiker.co.nz/forums/sh...anyone-want-it

**gav** · 13th November 2011, 20:01

So how does this run in F5 if its a purpose built race bike?
http://www.trademe.co.nz/motors/moto...-397931884.htm

**F5 Dave** · 13th November 2011, 20:06

Well chassis are open & the engine is a bog std GPR roadbike Derbi. They aren't really that flash bikes either. Good starter though.

**gav** · 13th November 2011, 20:37

Purpose built race bike ideal for young teen racer

Hmmmm .......

**Moooools** · 13th November 2011, 21:07

Originally Posted by gav

Purpose built race bike ideal for young teen racer

Hmmmm .......

But it uses a non competition engine. Do some research.

**gav** · 13th November 2011, 22:32

Originally Posted by Moooools

But it uses a non competition engine. Do some research.

How does a purpose built race bike use a non competition engine?

Oh well, another 50 on the grid I guess ....

**F5 Dave** · 14th November 2011, 08:17

well take the engine out & it is legal.

Then notice that the same engine you are holding is a production streetbike engine & put it back in. An awful lot more legal than some of the grey area aftermarket engine bits we have been discussing before.

**Moooools** · 14th November 2011, 08:31

Originally Posted by gav

How does a purpose built race bike use a non competition engine?

Oh well, another 50 on the grid I guess ....

Your logic is that if I put an FXR engine into an rs 125 chassis thus making a purpose built race bike, the FXR engine becomes a competition engine. Which is wrong.

Same deal with the metrakit, putting a street engine into a race frame doesn't make it a race engine.

This is pretty damn clear cut!

**F5 Dave** · 14th November 2011, 08:40

Now if for example they fitted the GPR engine up with a Metrakit race barrel then that would be a competition motor & illegal.

For some reason they left them std. I suppose that reason was cost & then income as people bought Metrakit parts & fitted them. Cunning really. Still leaves you with an undersized bike on funny wheels. Which is fine for kids, not so for Adults.

**kel** · 14th November 2011, 11:43

Originally Posted by F5 Dave

Now if for example they fitted the GPR engine up with a Metrakit race barrel then that would be a competition motor & illegal.

Why would the metrakit cylinder be illegal? The AM6 was never released as a competition motor (at least I dont think it was) therefore any aftermarket cylinder is legal

**Drew** · 14th November 2011, 12:07

So what cc limit is there if one was to turbo a 4 stroke?

**F5 Dave** · 14th November 2011, 13:10

Kel, unless we are getting into the 's' conversation then Metrakit release road & competition parts, or is it Kundo (KRD) been a while since I looked. So the race kits are competition parts.

But I think you are getting into the S conversation & I can't find that emocon that gives you a virtual whack with a fish.

Drew. In F5 turbos aren't allowed.

They are in F4.
Read the freeaking rules laziarse.