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CRF 250X Upgrade
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[QUOTE="Ol'89r, post: 1259440, member: 17212"] Not exactly sure but from comparing the two, your piston is more like 10 or 11:1. Going to the 13:1 piston makes the bike more responsive off of the bottom. We used the Wiseco 13:1 piston. Basically the same piston as the "R". One of the best parts of this conversion is the exhaust system. It gives good power and is very quiet. More so than the stock exhaust system. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
CRF 250X Upgrade
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