450cc Triple eligible for F3

[svr]

i would have thought he would only be able to go to 500cc, that is the twin limit unless it comes under the exemption with the production parts (ie SV650's)
sounds really fucken cool tho, even with the SVX450 motor

With a standard intake up to 650 twins are eligible (my reading)

[FROSTY:Me]

of course there are people in this world that rather than talking about it are busy out there doin it.
-The advantage of taking a 600 and "loosing a lung" has to be pretty odvious to anyone thats granaded a 450 or who has tried to get a commuter bike to handle like a racebike or has payed moonbeams for a bike.
if it works shit theres gonna be a ready market for 3 year old 600's

[scott411]

With a standard intake up to 650 twins are eligible (my reading)

rule that covers it reads,

over 500cc three or more valves per cylinder, are restricted to 650cc and fuel above, additionally these machines must retain oem air box, air filter element and carburettor,

i would say the airbox would be the biggest problem, it depends on weather you count the airbox being modified to fit into a new frame as a difference,

in my opinion i think it would, (again only my opinion)

but you are allowed up to 500cc 4 valve per head twins with the only restriction being fuel,

be an interesting day when that gets brought up, man its fun to be a steward some days

[CHOPPA]

or you could keep the 600 and race f2....

[koba]

Don't think a 9 Cylinder 450 2 Stroke would be eligible for F3

How about a 4 cylinder 250 2 stroke? Get an RG500 and sleeve it down, put it in a nice frame and have massif chambers coming out all directions and use 250GP fairings. Done and Done.

Nope, Has got to be a twin.
And limited even further to keep GP parts out.

Rules.

[gimpy]

Nope cant be done without welding up the heads and replacing the valves in a more central position.Someone whom shall remain nameless at this point is turning 600 into a 450 triple as we speak and if this guy cant get it too work then it cant be done.Looking forward to seeing it finished

Yeah should be interesting whether he can do it cost effectively,it will help the class if you can buy a 3-4 year old 600 and built it as cheap as a sv and be a front running bike.

[gimpy]

rule that covers it reads,

over 500cc three or more valves per cylinder, are restricted to 650cc and fuel above, additionally these machines must retain oem air box, air filter element and carburettor,

i would say the airbox would be the biggest problem, it depends on weather you count the airbox being modified to fit into a new frame as a difference,

in my opinion i think it would, (again only my opinion)

but you are allowed up to 500cc 4 valve per head twins with the only restriction being fuel,

be an interesting day when that gets brought up, man its fun to be a steward some days

shit its lucky I modified the frame to fit the oem airbox,can't wait till the first round.

[Ivan]

Yeah should be interesting whether he can do it cost effectively,it will help the class if you can buy a 3-4 year old 600 and built it as cheap as a sv and be a front running bike.

When will we be seeing your beast on track your last one was wicked

[Coyote]

How's the mighty GP100 going?

It's going great. Been teaching my girlfriend how to ride on it. Her second lesson will be tomorrow if the weather is ok. Haven't sorted out the front brakes yet though... Luckily I have a hill down my street to get it going

Can't be sure when I'll be taking it racing. Still at Weltec and doing unpaid work experience so funds are short and mainly borrowed.

[gimpy]

When will we be seeing your beast on track your last one was wicked

Hopefully maybe the last round of the vic club after some testing but probably the friday test day of the first round of nationals

[k14]

Hopefully maybe the last round of the vic club after some testing but probably the friday test day of the first round of nationals

Nah, give it a blast on boxing day

[svr]

shit its lucky I modified the frame to fit the oem airbox,can't wait till the first round.

Jeez, didnt you read the rules before you started building?!
Gonna be a wicked bike tho - do ya think that little 125 rear tyre will be up to it? Betchya theres a few sv national hopefuls praying for reliability `issues'...

[steve74]

a bit off topic but while we are talking F3, am i correct in my interpretation of the rules that you cannot get a standard 450cc mx bike and fit a road bike front end and shock (as per Roland sands 450 super singles concept) as the motocross derived frame is a no go. But there is no reason why you couldnt say put an RMZ450 or KTM525 in a rs125/nsr/rgv or even homebuilt chassis like jason eastons machine?

http://www.motorcycle.com/products/4...ect-68605.html

[scott411]

you can put any size single cylinder motor into any frame, as long as the handlebars are under 900mm off the ground, you are fine,

so if you can get your 450 MXers handlebars under 900mm, by any means my interpretation is that it will be legal

the super singles are fine

[k14]

a bit off topic but while we are talking F3, am i correct in my interpretation of the rules that you cannot get a standard 450cc mx bike and fit a road bike front end and shock (as per Roland sands 450 super singles concept) as the motocross derived frame is a no go. But there is no reason why you couldnt say put an RMZ450 or KTM525 in a rs125/nsr/rgv or even homebuilt chassis like jason eastons machine?

http://www.motorcycle.com/products/4...ect-68605.html

A guy up north (saw him race at manfeild) had a CRF450 motor in a RS125 frame. Seemed to go alright, he had major issues with rear tyres though. Even the hardest compound 125 tyre he would chew right out.