Zip 4t Tuning Piaggio Zip 5 4t - 42mph On Flats. 45mph Downhill. Wanting To Derestrict Fully, Can Anyone Help?

Piaggio zip 5 4t - 42mph on flats. 45mph downhill. wanting to derestrict fully, can anyone help? - zip 4t tuning

My Piaggio Zip is 4 times and all my friends 2 times going 60 mph and I really want to achieve in the position at 50 km / h in homes. Can someone help me. Thanks