my senda came de-restricted, second hand with a delorto 14mm carb, i dont know what the jet size is in the carb but it does about 55-60 mph easily. have you looked for restrictors in every piece of exhaust? The restrictor in some derbi models is a little tube just inside the silencers which some garages can knock out. other than that, i cant help you.
Re: Derbi Help
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