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Does anybody know how far to advance the timing on the 670 motor? I know if you go to far you can fry it. I had it advanced on my 583, but i wasnt the one who did it and i dont know how far it was either.
 

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If your gonna trail ride it dont even think about it, the 670 is edgy enough already, if your gonna just 500` it I can look up the specs but its measured in piston travel. Looking at it with a timing light however it really only looks like 3 degrees or so or the high side of the first slash mark, but again if your gonna trail ride it dont dooit.
 

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STock us .076 btdc ..racebook says you can go +.010...Irun mineat .082 and 155 psi. compresion...so a stock head should permit even more advance...IMO
 
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