Snowmobile Polaris 600 RUSH (2010 year). Manual - part 75

8.66

Steering and Suspensions

9923311 - 2010-2012 PRO-RIDE RUSH/Switchback/RMK Service Manual

© 2011 Polaris Sales Inc.

Rear Track Shock Service

1.

Raise the snowmobile off the ground with a 
snowmobile lift.

NOTE:  Lifting at the bumper will compress the RTS.

2.

Remove the seat assembly.

3.

Remove the nut holding the fuel tank to the x-brace.

4.

Remove the nut securing the shock to the rear crank.

5.

Carefully lift up the rear of the fuel tank to access the 
shock fasteners. Prop the tank with a block of wood.

6.

Remove the shock. To remove spring, turn preload 
knob counter-clockwise. Remove spring retainer, and 
then spring.

7.

To remove the reservoir, remove the two clamp 
screws. Note the orientation of the reservoir hose. 
route the hose as shown during installation.

8.

Assembly is the reverse of removal. Torque fasteners 
to specification using new lock nuts.

= T 

Rear Track Shock Fasteners: 33 ft-lb (45 Nm)



Reservoir Clamp Screws: 17 ft-lb (23 Nm)



Fuel Tank Screw: 7 ft-lb (10 Nm)



Seat Screws” 7 ft-lb (10 Nm)

8.67

Steering and Suspensions

8

9923311 - 2010-2012 PRO-RIDE RUSH/Switchback/RMK Service Manual

© 2011 Polaris Sales Inc.

RMK COIL-OVER REAR SUSPENSION

Suspension Adjustments

The primary tuning component on all RMK coil-over rear 
suspensions is the rear track shock spring installed length.

All RMK coil-over rear suspensions are manufactured with 
STANDARD rear track shock springs that will 
accommodate rider weights (with gear) up to



340 lbs. (154kg).

Initially, the rear track shock spring should be set to the 
rider’s weight (with gear). Reference the Rear Track 
Shock Spring (RTSS) Setup Table below.

RMK Coil-Over Standard Springs

• RMK = 7043680-133 (210 Rate)

• PRO RMK = 7043714-133 (190 Rate)

• RMK Assault = 7043572-133 (210 Rate)

RTSS Setup-Standard Spring

(Measure spring length with suspension off the ground.)

RIDER

 

WEIGHT

(

WITH

 

GEAR

)

MODEL

INSTALLED

 

SPRING

 

LENGTH

(

REAR

 

SUSPENSION

 

OFF

 

THE

 

GROUND

)

LBS.

KG

INCHES

CM

<160

<73

RMK

PRO RMK 155/163

10 3/4

27.3

RMK ASSAULT

10 7/8

27.6

160-220

73-100

RMK

10 1/4

26

PRO RMK 155/163

10 3/8

26.3

RMK ASSAULT

10 1/4

26

220-280

100-127

RMK

PRO RMK 155/163

10 1/8

25.7

RMK ASSAULT

10

25.4

280-340

127-154

RMK

PRO RMK 155/163

9 3/4

24.8

RMK ASSAULT

9 1/2

24.1

NOTE: BOLD/SHADED CELLS = FACTORY SETTING.

CAUTION

CAUTION: Do not adjust STANDARD spring length 

greater than (>) or less than (<):

RMK = >10 3/4" or <9 5/8"

PRO RMK = >11" or <9 3/4"

RMK Assault = >11" or <9 3/8" 

8.68

Steering and Suspensions

9923311 - 2010-2012 PRO-RIDE RUSH/Switchback/RMK Service Manual

© 2011 Polaris Sales Inc.

Heavy Duty Rear Track Shock Spring-RMK 

Coil-Over

An optional HEAVY DUTY spring is available if 
adjustments to the factory-installed springs are not 
sufficient for riders over 300 lbs. (136kg).

The part number for the HD spring is 7043741-067. 
Reference the RTSS Setup-Heavy Duty Spring Table 
below.

Measuring Rear Track Shock Spring Installed 

Length

1.

Lift the rear of the snowmobile off the ground or tip 
the snowmobile on to its side to remove the weight 
from the rear suspension.

2.

Use a tape measure to measure the spring installed 
length between the two spring retainers.

3.

To adjust, clear away any snow/ice that may be 
trapped within the spring or threads. Rotate the spring 
using a spanner wrench to change the length. 
Regardless of spring type, do not adjust the spring 
past the MAXIMUM or MINIMUM measurements.

Spring Retainer Spanner Wrench

Use the spanner wrench included in the tool kit to adjust 
the rear track shock spring installed length.

RTSS Setup-Heavy Duty Spring

(Measure spring length with suspension off the ground.)

RIDER

 

WEIGHT

(

WITH

 

GEAR

)

MODEL

INSTALLED

 

SPRING

 

LENGTH

(

REAR

 

SUSPENSION

 

OFF

 

THE

 

GROUND

)

LBS.

KG

INCHES

CM

250-300

113-136

RMK

PRO RMK 155/163

RMK ASSAULT

10 1/8

25.7

300-350

136-159

10

25.4

CAUTION

CAUTION: Do not adjust HEAVY DUTY spring length 

greater than (>) or less than (<):

ALL MODELS = >10 7/8" or < 9 7/8"

INSTALLED LENGTH

Spanner Wrench PN:

2871095-329

8.69

Steering and Suspensions

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9923311 - 2010-2012 PRO-RIDE RUSH/Switchback/RMK Service Manual

© 2011 Polaris Sales Inc.

Fine Tuning Adjustments

Additional minor adjustments can be made to the spring 
length to adjust the feel of the vehicle. Do not exceed the 
minimum and maximum installed length requirements.

For more ski lift (transfer), reduce spring preload by 
increasing the installed length. Rotate the spring 1-2 full 
turns counter-clockwise (when viewed from bottom). This 
will enhance maneuverability, making the snowmobile 
more “flickable” although it may hinder climbing 
performance.

For less ski lift (transfer), increase spring preload by 
reducing the installed length. Rotate the spring 1-2 full 
turns clockwise (when viewed from bottom). This will 
improve climbing ability and rider control.

To control the overall balance of the vehicle use the 
following guidelines:

• More rear track shock spring preload increases ski 

pressure. Less preload decreases ski pressure.

• Spring preload can affect bottoming resistance. 

More preload means less bottoming. Less preload 
means a softer ride (and more bottoming).

Both adjustments will affect overall balance and ski 
pressure.

After adjusting RTSS preload, the front track shock (FTS) 
spring preload and independent front suspension (IFS) 
spring preload can also be adjusted.

For a softer ride on rough, washboard surfaces, reduce 
front track shock (FTS) spring preload by 1-2 turns.

To improve corner stability, increase front suspension 
(IFS) spring preload by 1-2 turns on both sides of the 
vehicle.

Shock Dampening

Compression damping adjustments can be made on 800 
RMK and 800 RMK Assault models to control ride quality 
and bottoming resistance.

600/800 RMK - Rear Track Shock

Make the adjustments in half-turn increments, then test 
ride. To stop bottoming, turn the damping screw clockwise 
one half-turn, then test ride. Repeat the adjustment until 
bottoming stops and the desired ride quality is achieved.

800 RMK Assault - IFS and Rear Track Shocks

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) counterclockwise two clicks, then test ride. 
Repeat the adjustment until the desired ride quality is 
achieved.

COMPRESSION SCREW