Motoforce Racing cast iron sport cylinder kits for Derbi D50B0/1 50cc 2-stroke engines.

Robust cast iron bore offering every day reliability for use on the road. 5 transfer ports, a simple exhaust port and twin ring piston keep these kits rider friendly. The 70cc kit offers an increase of 3-4BHP over the standard 50cc kit with much higher torque versus the standard 50cc kit.

A 19-21mm carb, reinforced clutch & Stage6 Streetrace exhaust is recommended.

Included: cylinder, head, gasket set & piston kit.

Motoforce MF26.19301