This kit is compatible with Honda Z50J 12V and Honda ST50 Dax 12V, it will only work with the original 50 cylinder head found on these bikes. The kit comes complete with everything you need to increase a standard Honda 49cc engine to 88cc, kit also includes a aluminium cylinder.
This kit would benefit from a bigger carburettor but will still work with the original Honda carburettor.
This kit is not compatible with fuel injection Z50J!