110cc ultra kit with 52 stroke crank for 6 volt system with small crank snout.

110cc kit with 52 stroke crank for 12 volt CDI system with Thick crank snout. ATTENTION!!!!!When using this set on a New model engine you also need another Camshaft and camshaft sprocket!!!!!

110cc kit with 52 stroke crank for 6 volt system with the thin crank snout. For all 6 volt engines and Chinese replica 3-speed engines.

80cc cilinderset for stock 50cc head 53.5mm. For CB/XL/CY/Ape 50cc engines with the stock Cil.head.

XR50 / ZB50 / CRF50 / ST50 / Z50 / JC Knight. 72cc Big-Bore kit for the 50cc CDi engines (new type -GK4-) suitable for the stock 50cc cilinderhead !

XR50 / ZB50 / CRF50 / ST50 / Z50 / JC Knight. 85cc Big-Bore kit for the 50cc CDi engines (new type -GK4-) suitable for the stock 50cc cilinderhead !

XR50 / ZB50 / CRF50 / ST50 / Z50 / JC Knight. 85cc Big-Bore kit alloy for the 50cc CDi engines (new type -GK4-) suitable for the stock 50cc cilinderhead !

XR50 / ZB50 / CRF50 / ST50 / Z50 / JC Knight. 88cc Big-Bore kit alloy for the 50cc CDi engines (new type -GK4-) suitable for the stock 50cc cilinderhead !

XR50 / ZB50 / CRF50 / ST50 / Z50 / JC Knight. 85cc Big-Bore kit for the 50cc CDi engines (new type -GK4-) Complete with a 70cc ultra head and Z28 race cam ! (valves allready installed)

XR50 / ZB50 / CRF50 / ST50 / Z50 / JC Knight. 85cc Big-Bore kit alloy for the 50cc CDi engines (new type -GK4-) Complete with a 70cc ultra head and Z28 race cam ! (valves allready installed)