should my Derbi GPR 50 go faster than it is?

Derbi GPR 50 discussion forum:


should my Derbi GPR 50 go faster than it is?

should my Derbi GPR 50 go faster than it is? 
liam b said 2012-08-07 03:02 
 
my derbi gpr 50 racing 58 plate has a 21mm carb a leo vince v6 performance exhaust, 15t front sprocket and a 53 rear and it does 50mph i think it should go faster anybody got any ideas? 
 
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