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RiverBum

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About RiverBum

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    California
  1. RiverBum

    YZ 426 Backfire Problem???

    It's all about the Jetting. The main jet should be a 165 for elevations near sea level. The leaner the motor runs the more it back fires. Try the main jet first to 165 then a 168. The parts will cost you about 5.00 each. Have fun. The riverbum
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