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Engine Re-Build

619 Views 1 Reply 2 Participants Last post by  lvlpssyoak
Want to know what motor mods i can do to my 09 YFZ450R to getmore power but not make it so i have to work on it after every ride cause it has so much done to it. Also don't want to run any race gas.
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if you build a motor right you wont have to work on it no matter what you do. youll have a hard time getting hp on pump gas
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