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i have a 1990 650 superjet with just couple mods(intake grate, ride plate, flame arrestor, freestyle cone) and im looking to get an impeller but dont know which pitch would be best. im looking for low end launch but also good for freeride. i weigh 150lbs.

hi, i just purchased a 1990 650 superjet w/worx intake grate n ride plate and freestyle cone. what other mods can i do for some more bottom/mid power. is a dual carb set up a good idea?