Well, I finaly got all my goodies on my 07 XR650L. FMF Q2, Uni air filter, Dynojet kit, drilled the slide, and took all the smog crap off. What a difference in power. I see people are regearing there bikes. Most say to go to a 14/48. What is the top speed with this gearing. How would just dropping to a 14 in the front be. Also, the 55 pilot jet I bought was longer than the one I pulled out. Everyone needed to order the right one, so I took the long one to work and machined it to the right length and put a screw driver slot in it. What would of happened if I used the long one. Thanks for everyones help and advise. Thumper Talk is great.