Originally Posted by monkey wrench
I just picked up an 09 klx250 this weekend.
I'm thinking of putting the dyno jet kit in. will swapping the jets, while keeping the stock exhaust result in any performance gains? I like that the bike is quiet. I was hoping to "fatten" up the mix. I have a California bike so it's set up pretty lean stock.
It will improve throttle response. I found the "bog" with the lean stock jetting nearly unrideable.