With noiseless chain to make engine sound good.
Enhanced left crankshaft diameter and strengthened crankshaft to ensure its life.
Adopting automatic tension structure by spring, it can automatically adjust tension according to stretch of chain, it can reduce noise from chain movement and prolong chain life.
Optimization to engine transmission ratio and exhaustion system, it makes obvious improvement to engine performance under middle and low revolution speed.
Fuel consumption for 100 km is low and good exhaustion suitable for modern life.
Two way starter by electric and kick, meet different need for different people.
