I've been debating for a long time about changing the gearing on my 650L. I've read all of the threads, etc. When I'm in the dirt, I'm on the clutch a lot and really wish I had lower gears, but since I do a lot of highway commuting, I was worried about high RPMs. I decided to try a 14 tooth front this weekend and see what happens... It's GREAT!!! I could stay off the clutch, had much better response, and it pulls the front end off just by thinking about it! I decided to ride it to work this morning (even though it was only 36 degrees) and see how it would do on the highway... No problem! It cruised easily at 75 mph (until I saw the up ahead) and still had plenty of revs available. I wish I had done this a long time ago!