UD Racing Upgrade Kit 50cc for Polini 911 - GP3 (type 1)

This kit is suitable for the engine of Polini 911 and GP3.

This kit will replace the piston of 36mm diameter by a piston of 40mm diameter and will increase the engine displacement to 50cc.

This complete kit allows for greater responsiveness, torque and top speed.

This is the only kit with such a low price!

Compatibility:
- This kit can only be mounted on Polini 911 Pocket Bikes with the cooling inlet on the side of the intake pipe.
- This kit can only be mounted on Polini GP3 Pocket Bikes with a water supply coming from the crankshaft housing.

Included:
- 1x 5 transfer ports cylinder,
- 1x cylinder head,
- 1x gasket set,
- 1x piston kit (40mm piston, 10mm wrist pin)