I rebuild the engine, upgrade the performance with S&S crankcase and crankshaft, Wiseco Performance Piston, Andrew Performance Camshaft and Adjustable Pushrod. Change with STD 4 Spark Plugs Cyclinder Head, Dyna Ignition, S&S Super G Carb, S&S Air Filter, Sputhe 4th gear Transmission, and many more for the performance parts. I make the new rear fender, new single seat and etc.