Jetting?

[Yfz450dan]

Do you have to rejet with all aftermarket exhaust?Because my friend went to go buy a jet kit and the guy said that if your not having probelms its not worth it to buy the jet kit?:)

[acesfull]

Only if you want your quad to run right you should rejet with aftermarket exhaust, but if you want to run lean and burn up your engine then by all means don't rejet.