hi, thank you for your reply, but, due to the lack of info/advice from anyone else, i didnt try to fit the gy6 variator parts. my zx is running fine. replaced original carb to 1 from a peugeot speedflight & upgraded from 80 main jet to a 86 . fitted k&n style cone filter. & it runs a lot better now. still not "on the road" yet. as now have other projects. best regards. steve.