steep downhill with the wind at your back or get a bigger scooter, even my Piaggio b v 350 is electrically cut off at 85 MPH, with power to spare,. Alex at scooter west .com has modified his for 100 MPH. the manual warns us not to go to fast with windshield and top box on the scooter,. on my trip to east coast I went over 160 Kmph,. with no bad feeling with scooter, with wind shield and large top box,. just for short runs, I allways stick to the speed limits on long trips, or ride with the flow of traffic,.