There is a guy local to me advertising this:

Yamaha Grizzly – Sheave Modification – $450
Yamaha Grizzly – Sheave Modification

I am not physically able to do this myself, so before I have this guy do this I thought I’d ask which of you have done the same and if it does everything he is claiming. What interests me is the lower rpm at cruising speeds, since I do a fair amount of cruising @ 30 mph on gravel roads. I’ve always felt my 450 runs too high of rpm when doing that sort of riding. I still want smooth takeoffs like stock, and am not looking for higher launch rpm, so I’ll keep my weights stock. And what about long term reliability of the Dr Pulley greaseless sliders?