Balance shaft, engine more steady, vibratility less than same displacement engine.

Fuel injection piston, can control piston temp, maintain engine stability, prolong engine usage life.

Reasonable combustion chamber shape, more efficient inlet air, effective combust of mix air, better acceleration in low-mid speed, reduce fuel consumption.

Low cost, a little higher than traditional 125cc engine, but low than yamaha yb110, better performance- price ratio.

Timing chain with traditional and mature rubber wheel, reduce timing chain noise efficiently.

Oil gear transmission makes starter dynamo more reliable.

External engine oil filter , easy to clean. When oil filter need clean, only remove oil release cover in right crankcase. No trouble of traditional horizontal engine need remove right crankcase.  Transmission ,clutch, gear shift is the same with traditional 125cc engine, realize parts commonness ,compare with yb110, its structure more simple, makes easier after sell and maintenance.  Engine suspension is the same with traditional 125cc , fits for cub model, no need to modify frame.