686 VS 690 Hp numbers on raptor
#12
686 VS 690 Hp numbers on raptor
so if i have a port & pollish on the valves and have bigger valves. A 686 piston at 12:1 compression. what hp would that put out? also new clutches, No air box and a yousie titanium full system? I amlooking to beat the shees on Colorado Hill Climb Ast. these races are like pikes peak if yall have heard of that. i just want to show them that 4-strokes are not slow and "dumb"
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