1. It is High Performance Full Circle Crank Improved for Air Cooled 47cc and 49cc Pocket Bikes and Mini Motos.

2. It is More Stronger than standard crank. It can increase more power at least 30%.

3. 47cc full circle crank is mainly for 10mm piston pin type for 47cc Pocket Bikes.

4. 49cc full circle crank is mainly for 12mm piston pin type for 49cc Pocket Bikes.