Oil cooled, decrease the heat damage of the engine, make the longer using.
Starting could be in any gear.
Lighten piston with un-frication material, and together with the thin piston ring, can decrease the inertia, increasing the power output and make the using life longer.
Special Design on crankshaft, piston, camshaft, clutch, magnetor as the racer motorcycle, increase the explosive force.
Lighten magnetor made by tombarthite, will never demagnetization.
Material of clutch is anti-heat rubber, long using life. Strength shaft can be used safely.
