By: Dan Hardtrain Performance Exhaust System: Disclosure: MotoGearRater and Legendary USA have the same owner. Links to legendaryusa.com in this article go to our owner’s store, and are marked as sponsored. How we make money Upgrade the stock exhaust system to a high-performance aftermarket exhaust. This can improve both the sound and performance of the bike. Air Cleaner Kit: Install a high-flow air cleaner kit to enhance air intake, allowing the engine to breathe more effici