High torque when engine is at the low speed,climbing  strong,reliable performance.

Optimize the balance of crankshaft, little vibration.  simplicity and convenience the operation.

large oil pump capacity make the engine working more  reliable.

Degassing valve structure for intake valve and exhaust  valve, eliminate the influence of carbon deposition, and  make the engine working more reliable.

Add pressure relief valve structure,which makes the  start more relax.

Providing more different types of left & right cover for  customer choices.