Hope this is helpfull...from the Skinz site.
There is a specific way to test the function of ARC to see if its working, you’ll need to do this so that we can figure out why your not feeling the results. If your sled is sitting flat on the ground and you or any one else gets on the sled, you are compressing both the center shock and the rear shock at the same time. In other words you are already coupling, so engaging ARC wont show any difference. You have to isolate the rear shock as if the skis are lifted. First make sure that if your naturally aspirated you have 50 psi in the ARC shock and if your running boost then use 100 psi. Then place the skis on blocks and use a similar height block directly underneath the rear scissor (not the shock). This simulates an isolated load on the rear shock which is what ARC will assist. Press down on the rear a few time and then engage ARC. You should feel a noticeable change in the rear when its engaged, if not then the shock is not making it into its stiffest position. This is usually caused by play or stretch in the cable, which can easily be remedied by adjusting the cable tensioner on the lever. If the cable is very tight, you still need to adjust the cable tensioner out 1/8” to compensate for cable stretch (see instructions). We have had sleds out of adjustment that sound like what you are dealing with, and there is not a feel-able change from one position to the next.
Ive been riding a Ski-doo XM for two seasons with ARC and I wont ride in any technical terrain without it. Ive tested with Chris Burandt, Dan Adams, Chris Brown and more, in side by side climbing situations. The results are very conclusive and so Im convinced that if ARC is working properly it should be noticeable to you.
