I had same issue. I adjusted track tension to a half inch of sag 1 foot from rear axle with light downward preasure applied. Remove belt and cycle track around by hand and check for allignment lft/right.
"Just sitting" on the machine should never cause it to bottom out. If it does, your torsion springs are likely pretty well sacked out and/or are not in a high enough setting to support your weight.
Additionally, there could be issues with the skid that are causing it to collapse when it should not. With the skis and the track on a flat, level surface, check to be sure that the skid rails/track is in contact with the ground over its entire length. If it is not, I will predict that the FRONT of your skid is touching and the rear is not.
If you have good contact over the entire length of the skid, on both sides, then definitely look at the torsion springs as the primary culprit.
The track and studs shouldnt contact the tunnel any time thru suspension travel, regardless of spring tension, should they? My 96 xlt sp has very little clearance and would imagine a higher profile track or long studs would interfere, but the clearance stays the same thru the travel.
That depends on whether the track on it is stock or not, and how tall the studs are. Clearance between the track and the tunnel should remain constant on the *sides*, but not above the track. As the suspension compressed, the track moves closer to the tunnel.
With a stock sized track and appropriate accompanying studs, it should never contact the tunnel as a result of travel. However, many people install the tunnel protectors because that track will "bounce" while in operation and could travel further upward and hit the tunnel even though the suspension does not necessarily push it into the tunnel.
Right, which is why i thought to check tension as a first easy check. With tight clearance a slightly loose track would slack on top especially during decel. Pulling up a quarter inch of slack made the difference on mine, but i dont have studs.
How long are the studs?
Does the track look fairly new. Maybe been replaced. Make sure everything is tight. My 93 rattled apart once. Need locktite on the bolts.
Is the rear mounting shaft bolted thru the tunnel or a dropped bracket?