Suspension Quick Set-Up Guide

Content Source: 2019 Timbersled ST 120 RAW Owner’s Manual (9928985 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 Timbersled snow bike are easy to adjust. Just remember three simple steps:

Ride your snow bike.
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 Timbersled snow bike.

Ride the snow bike 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 snow bike 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 lighter steering on your snow bike, 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 snow bike and continue making spring and clicker adjustments until you achieve the perfect ride.

Ryde FX Coil Over Shocks

All RAW models are equipped with Ryde FX coil over shocks specifically designed for snow bike application. The Ryde FX shocks have no spring pre-load, compression, or rebound adjustment. They come from the factory pre-set with the best recommended settings.

Front Track Shock Spring Settings

NOTE

The Ryde FX shocks that come standard with all RAW models are pre-set with the best recommended settings. FOX Zero Pro and FOX QS3 shocks are available as accessory suspension upgrades.

Factory settings, combined with user adjustments to the front track shock spring, should be all that’s necessary to provide the best riding experience for most riders. 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
Ryde FX	N/A	N/A
FOX Zero Pro*	7–7/8”	7–7/16”
FOX QS3*	7–7/8”	7–7/16”
* Can be offered as accessory suspension upgrade.

Rear Track Shock Spring Settings

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 Timbersled dealer can assist.

Factory Spring	Maximum Installed Length	Minimum Installed Length
Ryde FX	N/A	N/A
FOX Zero Pro	7–7/8”	7–9/16”
FOX QS3	7–7/8”	7–9/16”

TSS Shock Tuning

The TSS suspension system is intended to work in harmony with the in track rear suspension that create a dual rear suspension feel that is unique to a Timbersled snow bike. It is not intended to have a soft squishy feel like the stock motorcycle rear suspension. It is important to not try and tune it to feel this way. For maximum suspension performance follow the tuning instructions.

The TSS shock is preset from the factory with 260 psi. This is tuned best for a 150 lbs. to 200 lbs. rider. Your kit includes a 300 psi Fox Float air pump to adjust the spring rate and preload of the TSS shock. Your shock will have a sticker on it with the air pressure tuning parameters and recommendations to best fit your body weight.

Suggested TSS Pressures
Rider Weight (lbs)	PSI
Minimum	200
Factory	260
Maximum	400

To tune the TSS shock, do the following:

Take the weight off the shock by lifting the bike from under the engine or tipping it on its side.
Remove the silver valve cap.

Thread the pump onto the valve-stem until the pump pressures up and you will be able to see the supplied pressure on the gauge.

NOTE

When the pump pressures up the shock instantly loses 20 psi from the volume it takes to fill the pump hose. You will need to compensate for this when checking pressures.

When finished, unthread the pump. You will hear it release air, but will not affect the exact pressure you gave it. When tuning your TSS shock it is best to change air pressure in increments of 25 psi at a time.

NOTE

When tuning your TSS shock it is best to change air pressure in increments of 25 psi at a time. Be very careful to not get snow or water inside the valve stem; this can cause the shock to leak air.

For a more refined tuning method the TSS shock has an O-ring on the outer shock body. This O-ring is intended to be a gauge to show how much travel you are using. The TSS shock has a max travel distance of 1.5” to bottom out. It is recommended that the targeted amount of shock travel used is 1-1/8” of stroke. Tune in increments of 25 psi to accomplish perfect calibration.

NOTE

Once you have made an adjustment slide the O-ring back down and ride for approximately 10 minutes before rechecking your shock travel distance.