Sarah bought this roller because it was purple, thats where it started, and I am not an E50 guy, I normally find them pretty boring, but I had the parts so why not? I rebuilt the motor, then got a second hand kit from DMW. Its a Puch Racing Shop kit, 44mm 64cc, piston port, DMW used to import them by the crate and I wish they still did, its hands down the best little PP kit you can get for puch, better then Airsal/Kstar/Athena/TCCD for sure, it has fantastic porting and with a matching head it can really rip, 53mph of rip to be exact. This was also my first time tuning a Polini carb, and I am impressed, this bike was doing 44-46 with a 15 bing, the Polini is really an incredible piece of work.