Piston 50cc N.T. 39mm for ZB50/ST50/XR50/CRF50.

Pistonring set 50cc N.T.39mm can only be used for the N.T. pistons (GK4)12volt engines

Piston pin 70cc 13x38 Aftermarket. Can be used for almost all Honda 70cc enginese as well as the 70cc chinese replica engines.

Piston 70cc 1st bore 47.25mm for 50Head 6volt engines only

Piston 70cc 3th bore 47.75mm for 50Head 6volt engines only

Piston 51mm for 6volt engines. Piston must be machined for the right type of head.

Piston 51mm for 6volt engines. This one is allready machined for an old style 6volt 70head.

Piston Honda Nice Std.size 50mm.

Piston XR75 Std.size 48mm. Can also be used for 6volt engines, however it must be machined for the right type of Cil.head.

Cilinderhead 50cc new style -GK4- assembled. This cilinderhead will only fit 12-volt engines.