Pistonset -GB5- 95cc (54mm) for 12 volt CDI engines. This in combination with the 70cc stock head or with the 70cc 6 volt head

Piston set -GT0- 47mm. This is for 70cc with 52 stroker crank if you have the 50cc stock head. Also standard TRX90 2003 piston

Pistonset -GB0- 85cc (51mm) for 70cc 6 volt head. For 6 volt engines. For use with oem crank and with the 52 stroker crank.

Pistonset -GB0- 88cc (52mm) for 70cc 6 volt head. For 6 volt engines. For use with oem crank and with the 52 stroker crank.

Pistonset 47mm (70cc) for 52 stroker crank. For 70cc head

Piston set -GK4- 51mm (85cc) for 12 volt cdi engines with the stock 50 head. So for the new model Dax / Monkey / XR50 / ZB50

Piston set -GK4- 52mm (88cc) for 12 volt cdi engines with the stock 50 head. So for the new model Dax / Monkey / XR50 / ZB50

Pistonset 47mm (70cc) -GB5- for 12 volt cdi engines with 50cc 6 volt old style head

Pistonset 70cc -087- 50head standard size. This piston is only suitable for the old style 6-volt engines with the old style 6-volt 50head.

Pistonset 70cc -087- 50head 1st oversize. This piston is only suitable for the old style 6-volt engines with the old style 6-volt 50head.