FWIW - If you are thinking of making a change here is my ride report. I consider myself a slow desert recreational rider. I have been seriously hurt and have no intention of sustaining any further M/C related injuries so I closely monitor the actions of my right wrist. I just put a 52T rear sprocket on my 09WR450. Prior to the change I felt I was always between gears 2nd was too low and 3rd was too tall. Now after a week of riding I discovered that I pretty much don't think about the gearing at all. In general, 3rd is perfect for 80% of my riding and I drop down to 2nd for hill climbs. 1st is for really gnarly stuff. One side benefit that I had not thought of, I found myself getting a bit sloppy with gear selection a few times and the motor just lugged way down and pulled me out of the situation. Had I not changed the sprocket I am sure I would have stalled several times. Of course the front wheel is much lighter and easier to lift over obstacles. I am very happy with this change.