I purchased a 450 a couple months ago and after 2 hours of trail riding with stronger machines I wanted more! I figured a clutch mod was the way to go.

The clutch mod (machined sheave and orange secondary spring) took some time and after two months it was finished but I had forgotten what it was like without the mod. The top speed stayed the same and maybe it pulled a little better on the trail.

The problem that I have now is that it requires a lot of rpms to get moving from a stand still and I’m not able to move in reverse when I hook up a trailer (due to rev limiter)

I never tried this before doing the clutch mod and would like to hear from fellow 450 drivers