well i have just got a derbi gpr50 racing 2005 and it did 37mph standard and toushin 60mph de-ristricted and you still have all the little extras to put on after i.e sprocket, exhaust system, 70cc kit, 80cc kit, over bore kits ect but i can honestly say they are unbeliveable to ride it sticks to the road like glue but all the extras are incase thats too slow for you, or you could get the derbi gpr125 racing 2005 and that does 105 mph de-ristricted get back to me thanks mark
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