Originally Posted by biknut
My 80cc has a 36T and will do a little over 35 mph, and I have a 50cc with a 40T and it will do about 30. These are top speeds though. A dependable cruising speed is about 5 mph less.
I found out if I lay down on the 80 I can do 40 mph, but don't tell anyone because I'm a member of the 20 mph club.