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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Porting and Head Mods for a Stroked Engine
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[QUOTE="Brianc, post: 547700, member: 26159"] We are having Powroll incease the stroke of our crank 9.5 mm on my son's CRF150. I know there are other companies stroking the 4 strokes a similar amount for more torque and h.p. through a broader rpm range. Stroking typically works best on an engine that is already oversquare, (the bore is larger than the stroke) [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Porting and Head Mods for a Stroked Engine
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