Content Source: 2021 INDY VR1 / INDY XC / Switchback ASSAULT Owner’s Manual (9931271 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.

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Suspension Quick Set-Up Guide

The front and rear suspensions on your Matryx snowmobile are easy to adjust. Just remember three simple steps:
  1. Ride your snowmobile.
  2. Adjust the rear track shock spring to tune vehicle balance (ski pressure and weight transfer).
  3. 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

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Rear track shock
Front track shock
Front (IFS) shocks

Shock Compression Damping

The primary adjustment for overall vehicle balance is torsion spring preload. Perform this adjustment first. After adjusting torsion 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 front and 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.

Torsion Spring Adjustments

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To adjust rear torsion spring preload, rotate the three-position cam using the engine spark plug tool. Adjustment is easiest when the cam is rotated from low to medium, and then to high. Rotating directly from low to high will require significantly more effort. Different rate torsion springs are available if a firmer ride is desired. See your dealer for more information.
NOTE
Adding 1+1 seat, or additional cargo may affect handling and require a spring rate change.
Torsion Spring Setting Recommended Usage
Low

Rider(s) and gear =140-180lb

If less than 140, use the optional spring chart for softer springs.
Medium

Rider(s) and gear = 180-220lb
High

Rider(s) and gear = 220-260lb

If above 260, use the optional spring chart for heaver springs.

Optional Spring Kits

Kit Number

Spring Type

Description

Fitment (By Track Length)

2884973

Spring, Torsion

Light Duty

 129/137

2884974

Spring, Torsion

Heavy Duty

 129/137

2884975

Spring, Torsion

Extra Heavy Duty

 129/137

2884976 (Switchback Assault)

Spring, Torsion

Light Duty

 144/146

2884977 (Switchback Assault)

Spring, Torsion

Heavy Duty

 144/146

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.

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IFS SHOCK SPRING SETTINGS

IMPORTANT
The factory installed length of the IFS Shock Spring is equal to the maximum installed free length.

FACTORY SPRING

FACTORY INSTALLED LENGTH

MINIMUM INSTALLED LENGTH

Matryx INDY VR1

10.75 in (27.3 cm)

9.75 in (24.8 cm)

Matryx INDY XC

10.75 in (27.3 cm)

9.75 in (24.8 cm)

Matryx Switchback Assault

9.75 in (24.8 cm)

8.75 in (22.2 cm)

IFS Remote Reservoir Factory Clicker Settings

Model

Clicker Setting

(from full stiff)

Matryx INDY VR1

5

Matryx INDY XC

5

Matryx Switchback Assault

6

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.

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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.
The front track shock is measured from the bottom of the spring to the top of the body cap.

Front Track Shock Factory Install Length

Factory Spring

Maximum Installed Length

Minimum Installed Length

Matryx INDY VR1

2.25 in (5.7 cm)

1.75 in (4.5 cm)

Matryx INDY XC

1.62 in (4.1 cm)

1.38 in (3.5 cm)

Matryx Switchback Assault

1.75 in (4.5 cm)

1.75 in (4.5 cm)

Front Track Shock Factory Clicker Settings

Model

Factory Clicker Setting (from full stiff)

Matryx INDY VR1

5

Matryx INDY XC

5

Matryx Switchback Assault

6

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.
To reset clickers, rotate the clicker to full stiff, and then back off the same number of clicks for each shock.
The rear track shock of your Matryx vehicle is equipped with a shock clicker. The clicker will increase or decrease compression damping when adjusted.
  • For a stiffer ride, turn the clicker clockwise to increase damping.
  • For a softer ride, turn the clicker counterclockwise to decrease damping.

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Rear Track Shock Factory Clicker Settings

Model

Clicker Setting (from full stiff)

INDY VR1

6

INDY XC

5

Switchback Assault

6

Rear Torsion Spring Kits

All AXYS and MATRYX vehicles are equipped with standard stock rear track suspension springs. To customize your ride, rear torsion spring kits can be installed to accommodate your particular total rider weight range.
Kit Description Part Number Weight Range – Lbs (Kg)
Factory-Installed Stock Spring 7045190, 7045191 140-260 lb (64-118 kg)
Factory-Installed Stock Spring (144/146) 7041629, 7041630 140-260 lb (64-118 kg)
129/137 Light Duty 2884973 0-180 lb (0-82 kg)
144/146 Light Duty 2884976 0-180 lb (0-82 kg)
129/137 Heavy Duty 2884974 220-350 lb (100-159 kg)
144/146 Heavy Duty 2884977 220-350 lb (100-159 kg)
129/137 Extra Heavy Duty 2884975 310-425 lb (141-193 kg)

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