ok so awhile ago i bought the jd jet kit opened it and returned promptly as i was thinking why pay 70 bucks for a few mains and two needles..oh and two o rings. well my needle was worn in the clip position i use and the clip would not stay so i went back and they still had the jd kit now discounted because someone returned it
i doubted the instructions. needle on 6th clip..180 main? so i researched the crfs only jetting website and in one thread ~ tells us the unknowingb public that the jd needle is leaner thus explaining the seemingly fat jets. installed it did ap mod and by far the best bang for the buck mod you can do. if you have an older 450r and cant afford a new bike, order the 07 head from the crfs only store and a jd jet kit and let the kicking of EFI butt begin
