Well whats faster a Geared 50cc or a Piaggio NRG MC�?

well the thing is i have a piaggio NRG MC3 04 fully derestricted ZX la vinci racing exhaust and i get about 60-65 top speed on average about 65-72 down hill but ive had more than enough problems with as i have to unplug the choke because otherwise there is no power in the throttle i have change carbs, cleaned the carb, changed spark plugs and gaskets but still sometimes i get power loss the more i rev the throttle and sometimes still get power loss with choke unplugged. so i am going to consider selling it to get a Geared 50cc but is there any out there i can get about as quick as this but what would be even better if you could tell me whats up with my bike oh yh i have also changed the belt and rollers.