i built this for a project but decided on another route. it started out as a stock QT50 motor. I put a crankshaft and new piston/cylinder from a YT60 in it with all new bearings and seals. It also has a YT60 intake and reeds with the larger YT60 carb (also gone through)with a custom air filter. I also installed the larger YT60 clutch. The motor has a QT50 magneto so it's a bolt-in for a moped.
This little thing starts easy and runs great. Plug it in your Ped and have the fastest QT in town :-). I want $350 for it shipped to your door.