MXZ Race Spindles on GEN4 Summit

[kingcat162]

I might have to do this mod on the t3 also

In my opinion it was worth it - I have a 174 t3 and I find it made it alot more nimble in tight areas - combo'd with the post fwd its awesome - but ya it would've been less expensive if the gen 4 ball joints were the same as the t3's

 

[lilduke]

In my opinion it was worth it - I have a 174 t3 and I find it made it alot more nimble in tight areas - combo'd with the post fwd its awesome - but ya it would've been less expensive if the gen 4 ball joints were the same as the t3's

Forsure, looks good. My sled has a post forward. I was thinkin do the spindle mod, and a tunnel chop maybe, be pretty good.

 

[Jason4]

Uhhhh greatly. I would NOT recommend the 34” stance arms as my sled will just flop over with out much movement. I have my tmo limited so that also helps and this was before a 15” wide track. It’s even crazier now. The part number for the spindle is 505074649 x2, and 505072690 x4. You will have to make washers to space the tie rods upwards or I can make some for you. I believe it was about $300 CAD. I used my stock 17 to 19’s, 2020 was updated along with the spindle and these won’t work because they have extra material toward the front and won’t allow the ski to fit. Yes it lifts it up but I can’t remember how much I have pics of my stock 19 vs 17 mod. It also moves the ski forward and improves the suspension geometry for trail riding. Yes it will fully extend the front shock but only if you let the limiter strap out fully. The front shock usually is set to be at 13.5” to 14” but the front shock is too short at 14.5” and I’m looking into longer shocks to try. I know a 16” is too long and won’t fit but a 15” is perfect. If you are interested in this I highly highly recommend getting different shocks for at least the rear. The stock rear shock literally just kills itself hahah especially if you’re bigger and carry extra weight. It’s definitely a mod that I can’t live without and am doing it to my 19 as well. You will also need all new lock nuts 232521464 x4 and 233201464 x2. I’ll upload some pics of everything again

Thanks for all the info! I ordered a set of RS spindles to put on my 2020 Summit Expert, can you expand a bit on why you need to space the tie rods up and why the Expert ski rubbers won’t work? I swapped spindles on my 2018 Summit to the new deep snow version and have the original rubbers somewhere but I don’t remember there being much difference between the two when I swapped them.

Thanks for putting money on the line and trying new things!

 

[Jason4]

I got a set of the RS spindles mounted on my 2020 Summit Expert and have had a chance to take one ride on it. I replaced the spindles, swapped the ski rubbers to the 2018 Summit ski rubber (should be the same for 2017-2020 non-Expert), and replaced the 4 nylock nuts on the ball joints. I didn’t do anything to space the tie rods, the upper A-arms clear the shocks ok on my Fox Floats. The hardest part of the swap was getting the ski bolt back in with, there’s a bit of preload from the ski rubber but I was able to get it all assembled without any extra hands. I thought it was easier to install the ski onto the spindle before I put the spindle on the sled.

I still need to open up the limiter strap another hole to adjust for the taller front end.

When I rode I was able to swap back and forth between my sled and my wife’s stock 2022 Summit X. I prefer the feel of my sled now and thought her sled was too low and less stable. Crossing old tracks was much better on my sled than on hers. I also thought I could lean the sled over further in a turn and still stand it back up without washing out and laying it down on it’s side. Trail manners were very much improved with less ski darting on the ride from the truck into the riding area.

I think there’s still some improvement to be made with he suspension setup but I’m happy with the RS spindles.

 

[Longhairfreak]

Like Rene G said, Wanted to lift the chassis up and out of the snow, doing so will decrease stability and hopefully make it easier to tip over. Also the steering geometry is better, moves the skis a 1” ahead, and also puts more pressure on the front of the ski. Kind of like the experts updated rubber does

It doesn't make any sense to raise the front end on a mountain sled.

 

[Jason4]

It doesn't make any sense to raise the front end on a mountain sled.

It raises the center of gravity (tips easier and larger sweet spot on edge), raises the lower A arm (less drag in deep snow), and raises the side panel/running boards (leans further before “paneling out” in deep snow or sidehill). In addition to the reasons to raise the sled the RS spindles also move the ski bolt in line with the ball joints which reduces darting on the trail.