Yamaha Raptor 350 & Warrior Forum

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  1. BornWithNoBrains

    need help(jetting)

    i have a fmf magamax on a 02 warrior..t backfires a little so i wanted to jet it...but when we took out the main jet it was a 155>>(but its a old 155 the short stubby one) any way i have a 148,150,155 and there all DG performance jets...but we tried all of them and it wont run..unless its on...