Unless you gear them the gearing runs out at 58mph but remember ped speedos suck so it will probs read 70 lol
It might push 65 70 but 70 is just acceleration the gear up will add top end but remember its a ped your end up spending ££££££££ to get an extra 1mph and your clock says 50 but I bet your either going faster or slower than it says
Mine is a 2001 piaggio zip ac with a zx exhaust malossi air filter malossi rollers and belt it's been polished and a stage 6 clutch and custom plastics I made up and other bits and pieces it does 60mph read from a car and 69 read from my speedo lol I could make it fast but tbh it pulls away faster than most cars and the more you do to it the more that goes wrong like 70cc kits what's the point in a few miles an hour faster when they break all the time. when I got this ped it was grey and rusty parts was broken and damaged and needed a good internal clean but it's fine now what you think?