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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Yz250f
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[QUOTE="wrooster, post: 112427, member: 21800"] 13.5K is the result of a short stroke + light piston, pin, and rod + low valvetrain mass + small crank angle + proper intake and exhaust flow geometry. oh, a dry sump helps too, no oil windage. what you should be asking is how a multicylinder 1000bhp formula 1 race car engine can rev to 20K rpm. the wrooster [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Yz250f
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