Re: Bike motor kart questions
I run consistently at 35 mph on my 48 with the 44t sprocket.
That's with matched transfers and no head gasket, but those mods are easy to do. I always recommend taking the engine completely apart to clean out any shavings before running it. Once it's apart, porting it is the next logical step.
Where are you seeing the 48cc engine with a centrifugal clutch? Are you sure it's not a 4 stroke?