AIR SHOCKS ON REAR SKID 121.....?

[yukon yamaha]

has anyone tryed or even entertained the idea of putting fox evo's or "X's" into the rear skid of a 121 rtx? I have seen the new mtx machines and the weight they lost this year and that many pounds lost on a short track would be epic!..... i have been playing with the idea for a while, but i cant seem to find the right length shocks and i am not famillier enough with fox shocks to know what they have that would work.....
any help and all input is welcome please!

 

[yukon yamaha]

i think that it could work but looking at the suspension i might have to change the shock mount abit. I dont know if they would be stronge enough to do the job of the springs and shocks and not break the mounts

 

[Monster00]

I dunno about this i know fox floats are one of the best pair of shocks you can buy for a quad. For you quad riders i'm also saying better then Custom Axis and Elka. But just the weight of the snowmobile and the rough terrain I don't know if they will be able to handle it. You can only put so much PSI in a canister such as a shock. But i could be wrong.

 

[Alatalo]

The idea is interesting and one should really check what it takes to get them into the rear skid. In contrast to the front end, I could think about couple of possible advantages offered by the quite extreme progression of the air springs...

 

[yukon yamaha]

yeah i think the hardest part will be not the length of the shock but how it reacts with the front shocks, i figure if the shocks on the new mtx can handle the length of a 152 + a more vertical shock position on a 121 should be easy enough, i am trying to make this work i have a few parts of a wreck sled and i will post picts when i get the parts back from the shop

 

[Alatalo]

Just from looking at pictures, it does not look impossible.
Shock absorber total length as well as stroke seem to be fairly close.
Then, calibrating a rough trail sled and a mountain sled is two completely different things...

 

[ahicks]

I don't think the calibration would be too big a deal. The valve stacks should end up being very close to what would work in a conventional shock. There's just not that much difference once inside of a Float. Compression may be a little different, but that shouldn't be very difficult to work around.

The really early (90?) Poo Edge suspension used a rear coil over, and I don't remember reading much in the way of structure failures at either end of that setup (nearly identical to this one) - though that would be one of my main concerns.

The biggest concern here, would be to come up with a shock that might fit....

 

[yukon yamaha]

yes, i would have liked to have a res on both front and rear shock in the skid, so it will be another hurdle to cross to make sure it wont rub or hit the other shock but i think it can be done! i do think that the suspension will be super stiff and that is what i am looking for and it will rock for boosted sleds!