The '99 and later 400's had a good working clutch. If it's noisy, you can install different sized spacers to take the knock out of it. The secondary clutch has three different holes for spring tension, so it does have a level of adjustability. The grooves are caused by excessive riding slowly in high range. Unless it's very deep it won't cause a problem.
Clean them up and install a new belt.
I have no idea if the Polaris setup will fit.
2002 665 Prairie
FPS 12:1 pistons
FST Stage II Cams
Other weird stuff
2011 Stratos 186XT Bass Boat
Mercury Optimax 115hp
Minn Kota 70lb 24v trolling motor
Last edited by NovaKaw650; 03-23-2012 at 03:51 PM.