38mm pe

Yamaha Raptor 350 & Warrior Forum

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  1. M

    Carb question

    All, I am running a 38mm PE keihin carb on my 90 warrior. My jetting is a #160 main, #50 pilot and AJM needle on the second notch. My problem is my plug is covered with black soot. At idle and with a short rev there is a lot of black smoke coming from the exhaust. If I put in a brand new plug...