to see what your tranny is doing, take the cover off of the tranny, so you can see the belt and pulley, put the scoot on center stand, on solid ground ( cement ) and level, start the motor and rev it up to 7 or 8,000 RPM, look at the belt and it should be at the top of the front drive pulley, if not your belt could be to narrow for the pulley, I had to shave 1mm. off of the pulley faces each side because the belts I got where not the right width,