Rear Suspension Sag

Ron Burgandy · Dec 22, 2017

Does anyone know how much rear sag these sleds are supposed to have? after greasing my skid last night I noticed my sag is at 3" with nobody even on it, it maybe had 1" of sag last year? didn't really measure it. 2016 with 300 miles.

Sent from my iPhone using Tapatalk

dboe03 · Dec 22, 2017

I swear this is just a characteristic of the Polaris skid suspension. My 2014 Pro used to sag a lot, so much so that I assumed I blew out the shocks somehow. Took it to the dealer and along the way the bouncing on the road and trailor must have worked the gasses as the suspension was then more "tight". Never thought about it again after that but always noticed it sagged in the garage but once out riding it would be fine. Maybe others know more but just wanted to chime in that I've noticed this before as well....

tuneman · Dec 22, 2017

Need more sled specifics. Big difference between, say a Switchback Assault and a 155 Pro.

Make certain you're sled isn't sitting on casters. It'll sag a ton more when on them and give you very false readings.

Ron Burgandy · Dec 22, 2017

just the standard red/black pro 155 non clickers. track tension feels close to spec, sled is sitting flat on my conc floor.

i'll see how it rides next week when i'm out, if it rides fine and doesn't bottom out i'm ok with it, might play with my preload a little but i had it set pretty close last year so don't want to adjust to far.

Sent from my iPhone using Tapatalk

Perk · Dec 22, 2017

Did you have your skis up on skates? I don't know why but when I have my skis elevated the rear suspension sags just sitting. If I pull the skates out from under the skis, I can stand on the running boards and my sag is ~ 1-1/2 "

Ron Burgandy · Dec 22, 2017

Perk said:
Did you have your skis up on skates? I don't know why but when I have my skis elevated the rear suspension sags just sitting. If I pull the skates out from under the skis, I can stand on the running boards and my sag is ~ 1-1/2 "

sled is on flat ground

Sent from my iPhone using Tapatalk

HECKS · Dec 22, 2017

Once your rear shocks are warmed up, most of it will go away, coil overs more so then an air shock.
Had Fox Float 3's in a rear skid with quite a bit of sag, and when we asked the Fox dealer about it, they said you do want some degree of sag. When your sled is flying down the trail you want your suspension to drop into the hole(s) / whoops and let the shock soak it up. If you were to have zero sag, the entire weight of the sled (or tunnel) would be dropping in and cause more bottoming/control issues, etc.
They referenced a baja trophy truck, and how much sag they run, and rip across some nasty shiat, as the suspension drops into the terrain while the body has minimal movement.

JJ_0909 · Dec 22, 2017

1) Sag is good. The idea is for the skid to track the ground, keeping in contact with the snow. The Baja reference was good.

2) Oil warming up will change the damping characteristics, but not the sag. Sag is the byproduct of spring alone. Springs = position sensitive. (velocity characteristics are static) Damping = velocity sensitive (position characteristics static...more or less)

3) You know you have a problem if your skid feels like a pogo stick. (no rebound is a tell tale way something needs a rebuild)

4)Excessive bottoming too can indicate this.

Teth-Air · Dec 22, 2017

Your front skid shock does more than you may think. Tighten the spring on it and it helps the rear. Too tight and it will ride rough though.

Ron Burgandy · Dec 23, 2017

thanks for everyone's input, i don't really care about it soaking whoops or trail riding, i need it for powder and sidehilling, and in my experience you want your skid to be as tall as possible so your not dragging your boards. i'll just have to ride it and see how it reacts. might be an excuse to upgrade shocks

Sent from my iPhone using Tapatalk

matchrocket · Dec 23, 2017

JJ_0909 said:
4)Excessive bottoming too can indicate this.

My 163 has a small about of sag to it. Carl's re-valve on non-clickers completely eliminated the the sled's tendency to bottom out the rear skid on whooped out trails or playing in snowdrifts etc.

Killer Time Racing · Dec 27, 2017

Pick it up and put a 2x4 under the FTS and see if it goes away .. your skid is in this state when riding .

I've shown literally 100s of people this after rebuilding their shocks !!
It's a eye opener for all !!

AaronBND · Dec 13, 2018

Killer Time Racing said:
Pick it up and put a 2x4 under the FTS and see if it goes away .. your skid is in this state when riding .

I've shown literally 100s of people this after rebuilding their shocks !!
It's a eye opener for all !!

Well...............this didn't work at all.

Solarguy · Dec 13, 2018

Teth-Air said:
Your front skid shock does more than you may think. Tighten the spring on it and it helps the rear. Too tight and it will ride rough though.

To tight on the front track shock and you will trench IME

NapaMatt · Dec 14, 2018

Been through this once before...

The reg. RMK Models.. Have like 4 settings... LAME..

As the Pros you have a wide range with a turn of the jam nut.

Also.. If you get looking polaris Has since change the spring rate in the front track shock

New spring is like a 140.. vs a 110 i believe..

Stiffer New spring!!! Whole new sled!!

Much Better!!

my.02

catnuts · Dec 14, 2018

could be wrong but the way i adjust is to adjust rear shock untill up at its tallest then make sure it sags couple of inches with my weight got to adjust front skid shock accordingly. i do mostly off trail riding

Jaynelson · Dec 14, 2018

Trying to set up any vehicle with 0 static sag is usually a huge suspension fail.

Go by the rider weight in the owners manual for a baseline on spring length

Search

Rear Suspension Sag

Ron Burgandy

Well-known member

dboe03

Active member

tuneman

Well-known member

Ron Burgandy

Well-known member

Perk

Well-known member

Ron Burgandy

Well-known member

HECKS

Well-known member

JJ_0909

ACCOUNT CLOSED

Teth-Air

Well-known member

Ron Burgandy

Well-known member

matchrocket

Well-known member

Killer Time Racing

Well-known member

AaronBND

Well-known member

Solarguy

Well-known member

NapaMatt

Matryx 850 Pow Slayer!

catnuts

Free Member

Jaynelson

Well-known member

Similar threads