Bought the KLX 125, a 2003, ( for my son, about 115 lbs.) no owners manual but ordered the service manual right away. Any ideas on mods to the airbox, jetting or pipe to get smoother operation without much more money. The carb was pretty gunked up when I got it but (the Dealer) cleaned it all out, (I) dumped in some Seafoam and it is running a lot better now, but get some hesitation when twisting the throttle quickly. Any one know the stock clip position on the needle. Don't know if the dealer changed anything when they were getting it ready to go. Any input would be great. Havent figured out how to search for info yet.