if it happens when its cold maybe the fluid is compressing? just a guess. May want to try new springs if they do nothing maybe shock rebuild. Heard of the cat shocks needing rebuilds often. Not sure how a coupling kit would help. Thought all the does is sort of couple the front and rear suspension to prevent torque up and lifting the skis.
what kind of track shocks are on your arctic? im not sure, but did arctic use the "arctic cat technology"or act shocks on the rear suspension?? they are rebuildable, and it could be possible that you have a seal leaking down in them, just my thoughts though.
Arctic Cat shocks all seem to have a tendency to sag. Usually the sag is between 1 to 2 or more inches right at the top of the stroke, or full out. When you push down on the back of the sled there should be just a little bit of sag and thats normal. Also the shocks will fade a little when they get warm. they just get extremly soft, then after they cool off they are fine. You can rebuild them as many times as you want and you will still get the problem. For racing we rebuild shocks every weekend, and have the same problem everytime. Our shocks are a little different than the consumer, but work basically the same way. Any other ?'s i can try to help you with best I can as I do quite a few shocks and setups.
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