Based on the original 120-2 engine, it optimizes the crank connecting rod ratio, increases displacement, improves power and torque, and makes climbing more powerful and performance more reliable.

It is interchangeable with the 120-2 engine and has the same suspension interface as the entire vehicle.

Optimize the transmission ratio, adopt large module gears and shift gears, namely clutch and manual clutch. Improve engine usability.

A new type of eccentric structure crank and connecting rod assembly makes off-road racing more stable, less vibration, and more comfortable to ride.

The intake and exhaust valve degassing structure eliminates the impact of carbon deposition, making the engine work more reliably

The valve cam adds a pressure reducing valve structure to make starting easier.

Large overlap angle valve timing, high lift cam, outstanding for high torque and high power at high rotational speeds; Off-road racing is even more exciting and freewheeling.

Optimize the valve spring force value and the number of dense turns to make the valve automatically rotate and work freely and durable.