CBR 600 and CBR 900 conversions

helipaddy

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WHY

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two problems with using a bike tranny, one major excess weight and two, no provision is made for torsional reasonance caused by the reduction set up.

Tony
 

Earthboundmisft

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Hey Tony, I was thinkin the same thing. The hot tip would be to machine a custom billet crankcase using the Jap rotating mass, and top end, with a provision for a modern PRSU.
Beyond me...:noidea:
 

GyroRon

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I wonder if they are operating in 4th gear, that would be one to one out to the prsu I think. I always wanted use a superbike mill.
The yamaha snowmobile engines are basically superbike engines without all the crap you don't need. They are all based on the Yamaha R-1 sportbike engine.
 

WHY

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Hi Ron

With that being the case, then we are already a long way down the road with the snowmobile engines, sort of like don't mess with sucess just put the pedal to the metal.

Tony
 

alan243

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Apr 15, 2010
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With a supercharger or turbo and just a little work you can have incredable horsepower out of the yamaha motors..I have a 3 cyl motor with 4 pounds of boost that is right at 210hp, I also have a full race 4 cyl motor with 28 pounds of boost that is 482hp
 
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