FS:- Kenny Roberts Proton 2002 race bike

[yamaha_george]

http://rmdmotors.com/2002-kenny-roberts ... atsu-aoki/

[cad600]

You know the old saying - "If you ave to ask how much, you can't afford it" - well I can't afford that bike by a long shot but I would love to know how much it sells for.

They've got the 3 cylinder 2 stroke and the 5 cylinder Honda engined 4 stroke. Plus many other nice race machines.

[abs929cbrrr]

screw that i got a RC51~

[Yamster]

We can dream .
Just imagine....a track day at cadwell on that .

[yamaha_george]

We can dream .
Just imagine....a track day at cadwell on that .

Yeh, but John Kosinski's team Roberts GP bike at Brands Hatch was enough to satisfy me for the rest of my life. I cannot get the feel out of my head of having Kenny riding one handed looking back to encourage me to go faster & me going so fast as to be truly frightened (remember the thought of dropping a100K motorcycle )

[Yamster]

Yeh, but John Kosinski's team Roberts GP bike at Brands Hatch was enough to satisfy me for the rest of my life. I cannot get the feel out of my head of having Kenny riding one handed looking back to encourage me to go faster & me going so fast as to be truly frightened (remember the thought of dropping a100K motorcycle )

Must have been some day that one George .
Maybe one day i may be privalidged enough to have a go on one similar.

[yamaha_george]

Must have been some day that one George ..

Yam,
put it this way Mate it rates in my top 5 best days in 64 years, as to the bit about privileged darn right but then life deals those kind of things by just being in the right place at the right time. Kenny was well known in America when I first met him but outside know one knew who I was talking about! He became a legend overnight it seemed at the time and I next met him at Springfield with "The Beast" . we exchanged the odd note over the next twenty odd years then I literally bumped into him at Brands Hatch and it was like we were neighbours such is the man. had lunch and sat drinking with him and the GP crowd of the day in I believe Kevin 's motorhome, then onto the infield & pits. I wish I had my camera with me but the memories are for me it seems.

[apsolus]

can someone shed some light for me, whats with all the exhaust pipes? 3 of em and one in a different place than the others.

[cad600]

The bike in the direct link is Kenny Roberts own personal design. Every last bit of it. He had the chassis built and the engine built to his specs. It is a 500cc 2-stroke 3 cylinder beast. The top 2 cylinders exit directly under the rider through the tail and the bottom cylinder snakes around under the swingarm to the right side of the bike.

[Yamster]

Must have been some day that one George ..

Yam,
put it this way Mate it rates in my top 5 best days in 64 years, as to the bit about privileged darn right but then life deals those kind of things by just being in the right place at the right time.I wish I had my camera with me but the memories are for me it seems.

Too true,too true,and who needs photo's with memories like that.
Look at it this way George,you where probably going too fast to get a good picture anyway .

[yamaha_george]

Too true,too true,and who needs photo's with memories like that.
Look at it this way George,you where probably going too fast to get a good picture anyway .

Too bloody right there was no way I was moving a finger off those bars except to apply brakes :0

[apsolus]

so its not a inline 3? why not just use a collector? two strokes run better with individual exhausts?

[yamaha_george]

so its not a inline 3? why not just use a collector? two strokes run better with individual exhausts?

A,
no two cyls at the top out side, the inner middle one points down rather like one of the Honda NS 400<?>

Two strokes make their power from the pipe design , so collectors would be a no no .For more on this A. Graham Bell's book** is a good reference that is simple if a little dated.


** in the wiki books section

[DonTZ125]

so its not a inline 3? why not just use a collector? two strokes run better with individual exhausts?

Oh, the monumental ignorance implied in that simple question...

A properly tuned two-stroke expansion chamber can suck 'n' stuff fresh charge into the combustion chamber equivalent to running 7-8psi of boost. This, combined with putting out a power pulse every 360deg vice the 720 of a 4-stroke, is what allows 2T engines to produce the ridiculous specific power rates that they did (MotoGP had to go to litre bikes to push the 500s out).

The timing of the positive and negative pulses flying around inside doesn't lend itself to multiple pipes; snowmobiles used to run 2-1 and even 3-1 headers, but power was almost always improved by going to individual chambers. I can't think of a single sport bike, much less serious race bike, that ever ran 'headered' chambers.

[apsolus]

oh i see my questions have been answered thanks, but ignorant? cmon man we cant all know everything!