Oil-cool can decrease the heating bearing for engine,  length the engine using life.

It can be started in any gear.

Lighten treating piston with anti-frication material, and with  the thin piston ring, can decrease the power losing during  the running, make the power output increasing and the  using life longer.

Processing the camshaft, piston, camshaft, Clutch and  magnetor with the racer tech, increasing the acceleration.  Made of tombarthite material, can be with long time using  life, without demagnetization.

Clutch cushion made of anti-high-temperature rubber.  Strength start shaft is making the using safer.