This is the place to post your scooter builds; everything from stock Spree restoration to water-cooled drag bikes.
if your gonna get a belt, get a $20 gy6 variator off fleebay and a dio rear pulley, then get a 669*18*30 belt. re use you old boss maybe a spacer or 2. youll need to clearance the case and cover, but youll pick up a little take off power and more top speed. the 50cc gy6 variators have the same boss od but the ID is a mm or 2 bigger. I actually bored the gy6 variator ID 1mm and now I have an aftermarket variator on my blue aero with the AB07. and the rear pulley is same ID as the dio pulley but a little narrower. on the AB07 im running a 666*16.5* 30 belt. same take off but now I have an overdrive!