I have a performance exhaust i want to put on my 07 agility 125. The header is just a little bigger in diameter and the muffler does have baffles in side and it just basically has a bigger hole on the end and looks a heck of a lot better. What im wandering is if it is going to cause me trouble. Has anybody changed there exhaust on there agility 125. i know when you change exhaust that alot of times you have to rejet. Ive heard some guys say they didnt and some said they did, but ive not heard from anybody that has an agility and that has does this. Just give me you thoughts please. Any tips you have will be greatly appreciated.