I was looking to find out from someone what engine i size i could fit on the frame. The frame is in excelent condition,but the motor is in need of a new jug,piston,piston ring and crankshaft. I was wondering what size engine i could fit on there,and it dosent matter if its a 2 or 4 stroke or water cooled,preferably air cooled,but dosent matter. If anyone knows a good site for a new engine please let me know. Thank you.