I had my bike up to 38 mph the other day with a digital speedometer that was
GPS calibrated and a digital tach that showed 8310 rpm, I was very surprised
to see that, although it was only for about 4 or 5 seconds. At that rpm my
67cc engine was screaming and vibrating something fierce, and I didn't want
to grenade the thing. I'm running a 41 tooth sprocket, 18mm Mikuni carb,
and expansion chamber. Out of curiosity, what is the maximum rpm some of
you guys have seen?
shft.
