suspension for big guys - HCS Snowmobile Forums

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Old 04-10-2019, 01:04 AM   #1 (permalink)
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Default suspension for big guys

Looking into a mxz x 850 just wondering if they have enough factory rear suspension for big guys 300lbs or do they usually have to upgrade the rear springs to have a decent ride? any info is appreciated coming off a polaris pro x
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Old 04-10-2019, 01:20 AM   #2 (permalink)
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Looking into a mxz x 850 just wondering if they have enough factory rear suspension for big guys 300lbs or do they usually have to upgrade the rear springs to have a decent ride? any info is appreciated coming off a polaris pro x
Just bought "MXZ TNT" one myself but its still in the box till after my son graduates from HS. Yes if your over 260 you and I will need to put big boy springs on. I could be wrong about the X your dealer should know for sure but its no big deal.
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Old 04-12-2019, 06:07 AM   #3 (permalink)
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You will most likely need springs. Get, (or make), some of those torsion spring spacers too to put inside the coils of the rear springs, they do work and they do make a difference!
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Old 04-12-2019, 10:36 AM   #4 (permalink)
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They used to make HD springs. Made a huge difference and easy to swap out. Check Doo Talk. The HD's I bought were the same off the SX doo.

I'm roughly 225 geared up. Also, check into rear shock revalving.
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Old 04-14-2019, 11:49 AM   #5 (permalink)
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I bought a 2019 mxz 850 and the front end constantly bottoms out. center shock spring and shock is a joke at 300 lbs.i put heavier hygear springs on the ski shocks and it does the pogo stick now.rear is fine with the big boy torsion springs.without heavier springs and shocks revalved to them I would stay on flat trails.1300 miles and I hate it so far.
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Old 04-15-2019, 07:30 AM   #6 (permalink)
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Originally Posted by Big60 View Post
Looking into a mxz x 850 just wondering if they have enough factory rear suspension for big guys 300lbs or do they usually have to upgrade the rear springs to have a decent ride? any info is appreciated coming off a polaris pro x
Personally I would go to the X-RS suspension vs the X, all 4 shocks are a huge improvement over the X and the XRS is fully adjustable. My buddy at 285lbs first had a 17 850 TNT had to put on heavier
torsion springs but still wasn't enough, so he traded it in for a 18 X package with his springs it was better but he would complain about heat fade of the X shocks. Trade it in on 19 XRS again with his big boy springs and he is one heck of a happy man, always nice to have the big guy happy
The X package used to be a strong upgrade over the TNT/Adrenaline models but now Ski Doo watered the X package down.
What ever way you go your going to need the heavier torsion springs so you might as well get it done before you take the machine out of the dealership.
Have a good one.
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Old 04-15-2019, 08:50 AM   #7 (permalink)
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I bought a 2019 mxz 850 and the front end constantly bottoms out. center shock spring and shock is a joke at 300 lbs.i put heavier hygear springs on the ski shocks and it does the pogo stick now.rear is fine with the big boy torsion springs.without heavier springs and shocks revalved to them I would stay on flat trails.1300 miles and I hate it so far.
Sounds like you went the wrong way I would put the old springs back on and send your shocks out to get revalved last I check it only cost $35-40 to have it done. Last I checked the shocks that come on the MXZ are rebuildable?
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Old 04-19-2019, 11:41 AM   #8 (permalink)
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I have a 2019 MXZ X and my previous sled was a 16 Pro S SB in which I had the rear shocks revalved/rebuilt and resprung by HyGear. I go about 240lbs and ride aggressive. On my MXZ X, I have my front shocks set at 1, center shock at stock settings, rear shock at 6 clicks from full soft, torsion springs are set at 3 (my sit-in sag was a little over 2") and rear transfer blocks are at 2. I set it up this way at day one and haven't touched anything since...it's perfect for me. It's my first sled that I didn't feel I needed/wanted to send the shocks out to HyGear. If I were you...right from the start I wouldn't buy heavier torsion springs or revalve the shocks etc. until after you put a few hundred miles on it. Set your sag by your torsion springs and ride it for a few hundred miles and see where you are at with everything.
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Old 04-21-2019, 12:19 PM   #9 (permalink)
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I have about 3 inch sag in the rear with the big boy torsion springs.its nowthe ski pressure that is out of site. I tried tighten the center spring as far as it can and it still bottoms very easy.if I replace shocks with pro40 do they still have to be revalved for new springs.orcan I use the adjustability to control a heavier shoc spring.Or should I use the stock springs and just go with adjustable shocks. Or trade for a x-rs. wow
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Old 04-23-2019, 08:56 AM   #10 (permalink)
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You always need springs for your weight, the springs carries the load, the shock is just there to slow the movement. The shock is a damper not a "carrier", i.e the shock will never affect sag, it will however shorten the suspension stroke for any given bump just because it absorbs some of the dynamic forces.
You could say the shock's job is to take a very high, but short in duration, peak force and cut the peak down by spreading the impact over a longer time giving the spring time to do it's job.

For 99 out of a hundred sledders having adjustable this and that is overkill since they don't fiddle with it anyways. Having a good "shock guy" supply you with springs for your weight and then revalve the stock shocks for the springs/weight is almost always sufficient. Getting an XRS, or XRS shocks, will not take away the need for springs, and they will also need a revalve most likely.
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