Well I've had my moped a year now. Over the winter I put on a 70cc kit, a Proma Circuit exhaust, new Sava MC11 tires, replaced the tank with a NOS one bought from ebay, replaced parts in the variator, and tweaked the roller weights, put bigger shocks on it, upjetted the carb and custon built a better air filter. But I'm still kinda disapointed with the performance. It will go as fast as 70 - 80 KMH with a downhill run but on the flat straight away it will only cruise at around 55 - 60 KPH. I'm still working on it!!!