Chain With noiseless chain to make engine sound good.

Crankshaft Enhanced left crankshaft to strengthen crankshaft,ensure

longer life for crankshaft.

Tension structure Automatic tension structure with spring,it can automaticlly

adjust tension according to stretching of chain, it can reduce

noise form chain movement and prolong chain life.

Optimized performance Engine performance with obvious improvement under middle

and lower revolution speed after optimization to engine

transmission ration and air-exhaust system.

Economical advantage Lower fuel consumption for 100km, good exjaust

performance, meet the need for modem life.

Practical advantage Two type of starter for Electric and kick, meet the need for

different people.