A friend and I both are on 05 WR 450s, and we have some gearing issues, both feel that 1st gear is a bit high and 5th isn't high enough. I have had some problems stalling the bike and have recently installed a Revloc Dynaring to see if that problem is solved. But sprocket changes will only make 1st even higher if we want to get more speed at lower rpms. Not sure there is much to be done, don't even know if alternative gearing is available, I don't want to go there anyway. Any thoughts? Sure wish these motors came with a 6 speed.