There is not a conversion from cc to mph, but a 150 cc motorcycle will go about 70 mph.
how much hp is 140cc
a kawasaki 140cc is the best for jumping as well as doing lots of tricks
It goes 55 mph or 89 kph with stock gearing.
no.
about 5hp
if you already have a clutch on the 140cc GX just use the chain direct to axel..
5-6 horse power
i have had mine clocked at 83mph
the 140cc can reach speeds of up to 160km/h where the 125cc can only reach a maxium of 100km/h. this does depend on weight though.
about 5hp
990ml 10w 40 semi