Polaris 2001 High-Performance Snowmobile Service Manual (PN 9916690), Page 260Get this manual
STEERINGFRONT SUSPENSION The following is list of improvements to the 2001 440 XCF, 440600 Edge Pro IFS1New trailing arms made out of chromoly2Remote reservior IFS shocks with external compression damping adjustment (Arvin monotube) 3Dual rate IFS springs on 440600 Edge Pro (seperate springs) with adjustable transition point (between rates) 4Revised front suspension and steering linkage geometry 5Increased the outer radius rod sizes from 38" to 716" on the upper radius rod and from 38" to 12" on the lower radius rods6Steel trailing arm bushing (rear)7Completely new steering geometry and linkage8Improved steering rack9Improved fit between the ski spindle to ski pivot tube10Ground O.Dsurface, hard coat plated ski pivot bushing11Revised spring rates 12Greatly reduced steering linkage friction (post bushings, rod ends and new rack design)