Trenching when going uphill

[RX1Montana]

I am having trouble with trenching whenever the sled goes uphill. I have a stock rear suspension with the following settings:

Suspension is set in the lower hole in the rear bracket
Full rate adjustment: Top Hole - Position A (softest)
Control rods have 1.5 inches of travel
Rear shock is set at 3 (softer than standard setup by one click)
Middle shock is set at 5 (hardest) and upside down
Limiter straps have 3/8 of an inch of thread still showing

Any suggestions to get the rear end to stop trenching?

Thanks

 

[spray25]

If you have your rear support in the lower hole you need to make the center match it.

Try an MPI transfer kit instead of the transfer rods.

Why is your center shock upside down? I'm not sure it will even work that way? what about the internal valving/venting? Try turning it right side up and leave it pretty stiff. Rear sounds about right depending your weight.

Lengthen limiters all the way.

 

[Kachess]

My sled trenched twice as deep climbing in powder as my buddies Summits last year. It was very disconcerting considering I only weigh 135. After shedding 70+lbs (holtz a-arms/skid/scratchers, whiteknuckle exhaust, mpi battery, hartman tunnel extension, etc) It climbs equall to or maybe even a little better than my buddies 2003 summit 800HO with identical trenching in the deep stuff. It may be the the skid, but I'd bet it's the weight. It's a totally different sled now. I can throw "it", rather than "it" throwing me.

 

[My RX-1 Works]

trenching

problem trenching: a situation that occurs when too small a track is turned too slow by too heavy a snowmobile!! Solution: make the track turn faster to give the snowmobile more ground speed which will lift it on top of the snow. 2. Put a larger track on the sled, every other machine has a 159 or better. This will give more floatation or less trenching. 3. Shed as much weight as the wallet can stand. This will let the sled accelerate much quicker uphill, the higher the speed uphill the less the trenching.

 

[RX-1 Moose]

What you need is more transfer. In my opinion losing your transfer rods and going to MPI Transfer Enhancement Kit is the best $49.00 you will spend. You will lose weight and the sled gets up on top of the snow better. You have your suspension dropped in the bottom hole and that will hurt your transfer. I put mine there because I am big and with the turbo I am trying to lose some transfer because she really wants to tail walk. Another inexpensive way I lost weight before the turbo was, I gutted the exhaust my self, it cost me $30.00 to have a welder weld it back up and I lost 7Lbs. I believe I lost 6lbs with the removal of the Transfer Rods. Total 13lbs for $79.00. Not to bad.

 

[RX1Montana]

Thanks to all who responded. My biggest problem was the suspension was setup such that it was coupled as soon as I sat on it. I now have the control rods setup properly.

Thanks again