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TIMBERSLED

CENTRE D'AIDE

2020-06-05
Customizing Your RAW Suspension Setup

The front and rear suspensions on your Timbersled RAW snowbike are easy to adjust. Follow these steps:

1. Ride your Timbersled. Ride your snowbike in various terrain to fully experience the existing suspension settings before making any adjustments.

2. Adjust the rear spring to tune vehicle balance for ski pressure and weight transfer. After riding, you should be able to determine if the snowbike 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 snowbike, decrease the rear track spring preload or increase the front track shock spring preload.

3. Adjust shock clickers, if equipped, to tune ride quality for a stiffer or softer ride. 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 bottom 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.

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

4. Repeat as needed. Test ride the snowbike and continue making small 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 snowbike application. The Ryde FX® shocks have no spring preload, compression or rebound adjustment. They come from the factory preset with the best recommended settings.

Front Track Shock Spring Settings
Note that the Ryde FX® shocks that come standard with all RAW models are preset 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.

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.

F T S S settings
* Can be offered as an 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 pounds (136 kg), optional stiffer springs are available through an authorized Timbersled Dealer. To find a dealer near you, use the Dealer Locator.

R T S S settings

TSS Shock Tuning
The TSS suspension system is intended to work in harmony with the in-track rear suspension that creates a dual rear suspension feel that is unique to a Timbersled snowbike. It is not intended to have a soft squishy feel like the stock motorcycle rear suspension. It is important to not try to 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-pound to 200-pound 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.

Setting PSI
 Minimum Setting  200 
 Factory Setting  260 
 Maximum Setting   400 

To tune the TSS shock, do the following:

1. Take the weight off the shock by lifting the bike from under the engine or tipping it on its side.

2. Remove the silver valve cap.

3. Thread the pump onto the valve stem until the pump pressures up and you are able to see the supplied pressure on the gauge. 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.

4. When finished, unthread the pump. You will hear it release air, but it will not affect the exact pressure you gave it. When turning your TSS shock, it is best to change air pressure in increments of 25 psi at a time. Be 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 inches to bottom out. It is recommended that the targeted amount of shock travel used is 1-1/8 inches of stroke. Tune in increments of 25 psi to accomplish perfect calibration. Once you have made an adjustment, slide the O-ring back down and ride for approximately 10 minutes before rechecking your shock travel distance.

Timbersled TRIO Kit

The Timbersled TRIO is an accessory front shock. To change the air pressure, first use the supplied shock pump to set the air pressure in the EVOL chamber. To do this, locate the lower Schrader valve and attach the supplied pump. See the chart below for the recommended setting. To ensure proper ride characteristics, always set the pressure in the EVOL chamber first. Make sure the ski is off the ground so the shock is not under load and is fully extended before setting air pressures.

EVOL chamber P S I settings

Next, set the air pressure in the main shock chamber. To do so, locate the TRIO’s uppermost Schrader valve and attach the supplied pump. Pump to the recommended setting shown on the chart below.

Main chamber P S I settings

Check to ensure all tools are accounted for and all steps have been completed. DO NOT exceed maximum pressure. Contents of shock are under pressure. Never incinerate or puncture and never disassemble without consulting your service manual. Any of those may result in serious injury or death.

EVOL air chamber tuning tips:

  • The infinitely adjustable pressure setting in the extra volume (EVOL) air chamber regulates spring rate in the final portion of the stroke and controls the bottom-out characteristics of the shock. Increasing air pressure in the EVOL air chamber will give a more progressive spring curve to protect against harsh bottom-outs. Decreasing air pressure will provide a more linear curve to maximize usable travel.
  • When combined with the infinite adjustability of the main air spring, the EVOL air chamber allows the shock’s spring curve to be tuned for any conceivable ride weight and/or terrain condition. The pressure in the EVOL air chamber is adjusted to control the bottom-out characteristics of the shock.

FOX® Float tuning tips:

  • Your TRIO main shock chamber is a FOX® Float shock specifically designed for Timbersled to increase spring rate, maintain ride height and improve the overall ride and handling characteristics of the snow bike.
  • For Timbersled TRIO shock applications, the recommended main chamber air pressure settings shown above are unique to the Timbersled TRIO application and should be followed to achieve the best overall ride characteristics.
  • The spring rate is controlled by air pressure in the main body. Air pressure is infinitely adjustable, making Float the most progressive and adjustable air shock on the market.

For more information about TRIO, see the installation instructions for the TRIO kit.
For more information, consult your Timbersled Owner's Manual.
To view diagrams and find replacement part numbers, view the online parts catalog.

FOX® is a registered trademark of Fox Factory Inc.
Ryde FX® is a registered trademark of RIDE CONTROL, LLC 

Mots-clés suspension , adjustment , rtss , tss , ftss , shocks