I was going to put some money down on a new exhaust for my 450r 06 and saw that someone had to reject or buy a fuel/air controller is this true or is it as easy as slapping the new exhaust right on? love to hear some responses.
Yes, you would need to rejet the carb. depending on what year your 450 is depends on the jet size as well. its very simple to do really, all you gotta do is remove the flot nut onthe bottom of the float bowl and take a 6mm socket and remove the jet and swap it. its much easier if you take the carb off the quad as well