I own a GPR 50R Race Rep and i have had 82mph out of it and the acceleration is amazing. i have never been beaten yet in a race as i have put performance parts on it and spent £££ doing so and it is worth it. This bike has been finely tuned and new parts installed like a molossi Aluminium 80cc Big Bore kit, 21mm MK Racing Carb kit, Malossi racing clutch springs, Arrow Exhaust, Performance Reed Valves and New Suspension. Believe me this bike has a lot of potential but now i am selling it to get a car. if anyone wishes to ask any questions about purchasing it then dont hesitate to e-mail me. Thanks (the top speed has varied since putting new parts in since the big bore i bought is mainly for acceleration and not top end but is still v. fast).