Yamaha Raptor 350 & Warrior Forum

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  1. T

    please help, 379 hot rods stroker

    ok im new to messing with the internal engine parts. i have what i believe is a 91 warrior. i want to put in the hot rods +4mm crank(379cc). i am unsure on what piston to get. hot rods says you have to use their piston(P3001), i know you can use other pistons as i have seen it on this site. i am...