With our new engine, we improve the following items.
 
Complete Set Precise Piston/Sleeve 3PT Rod:
The sleeve is made from aluminum alloy piston with brass sleeve and the high strength connecting rod to improve its durability. The sleeve has three transfer ports which produce a liner power and a low fuel consumption. The hand-lapping sleeve also improved the scavenging and exhaust efficiency. The lightweight full-milled piston provides the engine power acceleration, which enabling the engine to have greater torque and better fuel efficiency, and also saving fuel.
 
Head Button with O-Ring:
The new head button adds an O-ring which can help to prevent dirt and debris, and also have better performance of constant temperature.
 
Backplate:
The new backplate improves the scavenging efficiency of the engine.