Hi my names dave I have just ordered my first Zbox 70cc kit hopefully all go's well and I'm riding next weekend.Could anyone tell me the dimensions of one of these motors i found a bike but not sure if it will fit
G'day man and welcome to MBc.
My general rule of thumb for doing a frame mount is that there should be a minimum of 36cm(14'') measured on the INSIDE of the triangular frame from the crank to the seat.
Really it should be more to allow yourself room for routine maintenance but at a stretch 36cm will do.