What you should get as paul oliver suggested is one of these badboys. Here. I had a 90cc version and it would easily hit 70mph, without any mods. So im sure the 50cc version will easily hit 50 mph. But anyway, i reccommend the SR50. There VERY quick when modded. Friend had one and it was easily the quickest moped that i have ever been on. Twas uber quick, Ive been riding motorbikes since i was 12. But i have never been on a 50cc moped that scared me. It would do about 65mph, and would stick on the road. So after getting used to it, you wouldnt have to brake round the corners, you could power round them. Hope this helps you from Lee