Its loved around the world ultra reliable simple to fix yet so lame, Dont no if any one has tried this before but i think it will be a good project to buy an old f***ed c90 and stick a 125 pit bike lump in it, The engine ive found is identical to the c90 lump just has a extra 38cc 2 xtra gears and a manual clutch, should spice up the scooter a bit.