If you are going to tune for performance, re-jetting the carburetor is the first place to start. Our #35 pilot jet is a setup up from the stock jetting. A larger pilot is necessary when an exhaust system or performance enhancements are made. This helps the bike idle better and avoid a lean fuel condition.
This items is intended for closed course competition use only, it is illegal to tamper with any EPA components installed on your on-road or off-road vehicle.