05 Derbi GPR 50 Racing discussion forum: RE: How do I derestrict my 2005 GPR50
Title
RE: How do I derestrict my 2005 GPR50 
Entered by
mareks 
Date
2009-10-21 20:07:41 
all you need to do is 1st take the silencer off then exahust (can) you have an restrictor in that you can easelly take that out, by pocking it with a srew driver. and it will be a bit louder and faster, and onother it there is a rescrictor in the carburettor, for the air filter, all you do it take that off and take the metal thing out of it and that will be your bike fully derescricted, but the best would be to get a sport exhaust for your bike. 
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