J Range and Lui Vega Cometa models use a different kickstart piston to their S1 / 2 3 equivalents, that has a different engaging 'teeth' design. These have now been remade and we supply these as a kit along with the locating pin.
The set consists of :
1 x M155a kickstart shaft internal piston
1 x M311 special screw (for M155a piston)