[dirty4man]

you dont need to rejet for just adding a K&N air filter.

 

[dirty4man]

if any adjustments are needed with the new filter you can tune it in with the factory carb parts. jetting it without an aftermarket exhaust, the only thing your going to do is burn more fuel.

 

[dirty4man]

I have seen a few gut the factory exhausts, but I dont know what kind of results they got from it