Wow that looks fantastic Nid ! the fitted piston sure takes the wear and tear out of the engine..... I mean your engine was hitting over 40 000 RPM at tank 1, and has been run wide open nearly its entire life and the engine looks like brand new after 2 gallons ! dam wicked engine and by far the best build quality I have ever seen from a Taiwanese engine.......I am very happy to see how clean that engine looks, especially after you beat on it so badly ! cheers Neal !