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  1. little problem quick question

    Yamaha YFM660R Raptor (2001-2005)
    ok so there is a trillion lean and rich questions but i dont know how to word this to find out.. so please help. bought 01 raptor 660r completely factory. bike was running rich would smoke black when revving. installed pro design air filter adapter uni filter and a slip on exhaust for now. and i...
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