Suspension Quick Set-Up Guide

Content Source: 2019 PRO-RMK / RMK ASSAULT / SKS 155 Owner’s Manual (9928945 R01) > The Perfect Fit Chapter

IMPORTANT

The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle.Always follow the warnings and instructions in Owner's Manual.

Click the CONTENTS link above for the Table Of Contents, or download a full PDF of the Owner Manual in the Owner Support area of Polaris.com

Suspension Quick Set-Up Guide

Introduction

The front and rear suspensions on your AXYS snowmobile are easy to adjust. Just remember three simple steps:

Ride your snowmobile.
Adjust the rear track shock spring to tune vehicle balance (ski pressure and weight transfer).
Adjust shock clickers (if equipped) to tune ride quality (stiffer or softer ride).

Step 1: Ride your snowmobile.

Ride the snowmobile in various terrain to fully experience the existing suspension settings before making any adjustments.

Step 2: Adjust the rear spring to tune vehicle balance.

After riding, you should be able to determine if the snowmobile needs more or less transfer.

For more transfer, decrease the rear track spring preload.
For less transfer, increase the rear track spring preload.

If you prefer your snowmobile has lighter steering, decrease the rear track spring preload or increase the front track shock spring preload.

Step 3: Adjust shock clickers (if equipped) for ride quality.

For models equipped with monotube shocks, always adjust the rear track shock spring preload to enhance bottoming resistance.

For models with shock clickers, you can adjust the clickers to control bottoming and adjust ride comfort.

Turn a clicker counter-clockwise to decrease damping for a softer ride.
Turn a clicker clockwise to increase damping for a stiffer ride and less bottoming.

NOTICE

Always adjust the clicker at least one click below full stiff (full clockwise) or shock damage will occur.

Test ride the snowmobile and continue making spring and clicker adjustments until you achieve the perfect ride.

Shock Locations

Rear track shock

Front track shock

Front (IFS) shocks

Shock Clicker Adjustments

Rear Track Shock

IFS Shock

Shock Compression Damping

Shock compression damping is available for SKS, ASSAULT RMK, and optional for PRO-RMK.

The primary adjustment for overall vehicle balance is RTS spring preload. Perform this adjustment first. After adjusting RTS spring preload to your satisfaction, compression damping adjustments can be made to control ride quality and bottoming resistance.

Compression damping can be adjusted at the front suspension and at the rear track shock. Make adjustments in 2-click increments, then test ride. When adjusting the front suspension, always adjust both clickers equally.

To stop bottoming of the front or rear suspension (stiffer ride), rotate the clicker(s) clockwise two clicks (as viewed from the top of the clicker), then test ride. Repeat the adjustment until bottoming stops and the desired ride quality is achieved.

For a more plush ride at the front or rear suspension, rotate the clicker(s) counter-clockwise two clicks, then test ride. Repeat the adjustment until the desired ride quality is achieved.

Front Suspension (IFS) Shock Adjustments

Always perform shock spring preload adjustments with the weight of the vehicle removed from the shock and with the shock at full extension.

To reset IFS clickers, rotate the clicker to full stiff, and then back off the same number of clicks for each shock.

IFS SHOCK SPRING SETTINGS

FACTORY SPRING	FACTORY INSTALLED LENGTH	MINIMUM INSTALLED LENGTH
PRO-RMK Monotube	10.25” (26 cm)	9.75” (24.8 cm)
SKS/PRO-RMK w/ Clicker	10.25” (26 cm)	9.75” (24.8 cm)
ASSAULT RMK	10.75” (27.3 cm)	10.5” (26.7 cm)

IFS Remote Reservoir Shock Factory Clicker Settings

Model	Clicker Setting (from full stiff)
SKS	10
PRO-RMK w/Clicker	10
RMK ASSAULT	10

Model

Clicker Setting

(from full stiff)

SKS

PRO-RMK w/Clicker

RMK ASSAULT

Front Track Shock Spring Settings

Factory settings, combined with user adjustments to the rear track shock spring (RTSS), should be all that’s necessary to provide the best riding experience for most riders. The primary adjustment for overall vehicle balance is RTSS preload. Perform this adjustment first.

Always perform shock spring preload adjustments with the weight of the vehicle removed from the shock and with the shock at full extension.

NOTICE

Never adjust spring preload to an installed length longer than the factory length or shorter than the minimum length as shown in the following chart. Damage to the suspension could result. When decreasing preload, make sure at least two turns of preload are holding the retainer against the spring.

Factory Spring	Maximum Installed Length	Minimum Installed Length
RMK	8.375" (21.3 cm)	8.2" (20.8 cm)
PRO-RMK	8.375" (21.3 cm)	8.2" (20.8 cm)
ASSAULT RMK	8.375" (21.3 cm)	8.2" (20.8 cm)

Rear Track Shock Spring Settings

For riders who weigh 160-220 lbs. (73-100 kg), test ride at factory settings, then make fine-tuning adjustments. See the following initial RTS Shock Preload Settings table.

For riders outside the 160-220 lbs. (73-100 kg) weight range, adjust the factory-set preload to the following installed lengths as a starting point, then test ride before making fine-tuning adjustments. Do not exceed the minimum and maximum installed length requirements. See the following initial RTS Shock Preload Settings table.

Always perform shock spring preload adjustments with the weight of the vehicle removed from the shock and with the shock at full extension. If adjustments to the factory-installed springs are not sufficient for riders over 300 lbs. (136 kg), optional stiffer springs are available. Your POLARIS dealer can assist.

NOTICE

Do not install accessory bogie wheels on the inside of the rail beams if your model is equipped with a remote reservoir rear track shock or damage will occur. The rail scratchers must first be removed as they interfere with the accessory bogie wheels.

Rear Track Shock Factory Clicker Settings

Model	Clicker Setting (from full stiff)
SKS	13
PRO-RMK w/clicker	13
RMK ASSAULT	10

Model

Clicker Setting

(from full stiff)

SKS

PRO-RMK w/clicker

RMK ASSAULT

Initial RTS Shock Preload Settings (Measure spring length with suspension off the ground)
Rider Weight		Model	Factory Installed Length		Minimum Installed Length
For Factory-Installed Springs
< 160 lbs.	< 73 kg	SKS/PRO-RMK	10.75"	27.3 cm	9.8" (24.9 cm)
		ASSAULT RMK	10.75"	27.3 cm	9.8" (24.9 cm)
		PRO-RMK 174	10.5”	26.7 cm	9.625" (24.4 cm)
160-220 lbs	73-100 kg	SKS/PRO-RMK	*10.5"	*26.7 cm	9.8" (24.9 cm)
		ASSAULT RMK	*10.5"	*26.7 cm	9.8" (24.9 cm)
		PRO-RMK 174	*10.25”	*26 cm	9.625" (24.4 cm)
220-280 lbs.	100-127 kg	SKS/PRO-RMK	10.125"	25.7 cm	9.8" (24.9 cm)
		ASSAULT RMK	10.125"	25.7 cm	9.8" (24.9 cm)
		PRO-RMK 174	9.875”	25.1 cm	9.625" (24.4 cm)
280-340 lbs.	127-154 kg	SKS/PRO-RMK	9.8"	24.9 cm	9.8" (24.9 cm)
		ASSAULT RMK	9.8"	24.9 cm	9.8" (24.9 cm)
		PRO-RMK 174	9.625”	24.4 cm	9.625" (24.4 cm)
*Factory Setting
For Optional 250 lb./in. Stiff Springs (see your dealer)
250-300 lbs.	113-136 kg	ALL	10.25"	26 cm	10" (25.4 cm)
300-350 lbs.	136-159 kg	ALL	10"	25.4 cm	10" (25.4 cm)