You really must have a bigger jet, if your saying you still have the stock #80 jet installed. For a derestricted scooter it should be #82, if you then fit a open air filter then usually its a #88 or #90 jet.
A race variator is a must, imo, better acceleration, much smoother ride and few mph top end gained usually. I got 3-4mph and ijust use a cheapo chinese clone race variator from Taipai scooter assassins. Im also in the uk, so the only downside to taipai is the long delivery time.
Check your plug to see how you are running now, probably be a little lean. If you intend to go open filter just order a 88 jet at the same time and put that in rather than do the jet to 82 now.
Keep any eye on tyre pressures, soft tyres lose you speed and are dangerous.