I have a 1985 PW50 with blown crankcase seals & a scored cylinder. I was ready to part the thing out but a friend told me that an older QT50 moped engine (found cheap on ebay) is exactly the same and would slip right into the PW using the same driveshaft, carb, coil, etc. Has anyone successfully completed this? I'd hate to buy the engine then have bolt patterns not line up and have to do a lot of unpleasant cutting and hacking for something with such little resale value. Any opinions are appreciated. Thanks in advance.