thinking of picking up a 95 sportster, body is good, seats good ,armrests need to be redone, motor runs great, idels great, but the guy says the carbs need adjusting to get it up to full throttle, runs great mid range rpms, new battery ,new ignition, I think I can pick it up for $600 is this a good deal? and whats up with the have to mess with carb thing, if this have rave valves I am thinking it could be those, I am clueless, please help me out, oh and the motor is kind of puny, I was thinking of putting in a bigger motor and impeller???