Does anyone have any experience with a baotian BT49QT 50cc 2011 I'm thinking of buying one that needs some work doing on it. First off the key start stopped working, then 2 days later the kick start stopped working. Then when the lad was riding it he felt something go, and lost all drive from the engine, The engine still runs but it doesn't put power to the wheel. Could it be, drive belt? Clutch or clutch cable? What could the key and kick start be? Solenoid? Fuse? Ignition amp? Any help before I dive in and buy it would be great. Thanks. Stu.