The true beauty of the classic two stroke motorcycle is the "power to weight" ratio. The two stroke engine is light weight by its very design. It has no valves cams or lifters. Combustion is a two step process. Intake, compression & ignition exhaust. A rapid firing in a two cycle process, thus the name "Two Stroke". This mechanical engineering coupled with a titanium frame, dry clutch, aluminum casings, and tuned exhaust produced some of the fastest grand prix road racing motorcycles in the late 1960s and 1