Well I learned a few things with changing things around.....First the original cylinder on my S4 is a 44mm with a 12mm pin

so I had to port the piston myself on my milling machine because the razor cylinder has a 44mm piston with a 10mm pin. I copied the pison port off the razors piston.
But with the replica carb, razor head this thing actaully RIPS!!!! but I could only get three rides out of it till I blew out the pull start!!!! SO back to daves for a metal pull start and I'll have to see how I can reinforce the pully on the starter so that thin plastic doesn't rip out.