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TIMBERSLED

HELP CENTER

2020-06-05
TRIO Installation and Adjustments

To install TRIO:

1. Place your bike on a suitable support stand so that the ski is slightly off the ground and the bike is secure from tipping over.

2. Make sure your upper fork tubes are in the stock OEM position in the triple clamps. You may need to raise or lower the upper fork tubes in the triple clamps if they have been adjusted for specific summer riding.

TRIO

3. Remove the rear bolt (A) and aluminum spacer (B) from the ski mounting block on the spindle.

TRIO

4. Remove the front fender from the motorcycle.

TRIO

5. Mount the upper TRIO mounting bracket as shown to the top of your TRIO shock using the supplied bolt. Make sure the upper TRIO bracket is facing forward in relation to the bike and the TRIO shock reservoir is positioned toward the rear of the bike. Torque to 40 ft-lbs (50 Nm). Note that the KTM® shock mounting bracket is symmetrical. All other model shock brackets have slotted holes on the forward side of the bracket and must be mounted with the slotted holes toward the front of the motorcycle. See pages 2 and 3 of the TRIO installation instructions for details.

TRIO

6. Install the supplied bolts and spacers into the upper mounting bracket. For Honda® models, install the two taller spacers to the front side of the shock mounting bracket as shown below. KTM, Husaberg® and Husqvarna® models require no spacers. Yamaha® models require four spacers of the same length that can be installed in any orientation. Kawasaki® models require four spacers that will need to be installed with the larger diameter portion of the spacer against the shock mounting bracket.

TRIO

7. Place the fender onto the TRIO shock assembly with mounting bracket and hardware as shown. Ensure that the mounting hardware, upper TRIO bracket, spacers and fender are lined up and the hardware is through all necessary pieces.

TRIO

8. Remount the fender and TRIO assembly to the underside of the motorcycle's lower triple clamp. Torque to 9.5 ft-lbs (13 Nm).

TRIO

9. Place the lower eyelet of the TRIO shock into the original rear spindle block spacer location. The Timbersled TRIO shock is designed to have around 1/4-inch of preload when installed. This may cause the TRIO shock to appear to be too long when mounting into the rear spindle block spacer location.

For easy installation while maintaining proper preload of the TRIO shock, bleed off the air pressure in the main shock chamber of the TRIO shock until you can compress the shock the necessary amount to line up the lower mounting eyelet of the TRIO shock with the mounting hole of the spindle block. Insert the M10 x 1.5-inch rear spindle block bolt (C) when aligned and tighten the nut (D). Torque to 40 ft-lbs (50 Nm).

If your TRIO shock is too short for installation, loosen the pinch bolts on the motorcycle's triple clamps and slide your motorcycle fork tubes up until the center of the rear spindle block bolt hole is 1/4-inch above the eyelet of the lower TRIO shock mounting eyelet. Tighten the motorcycle triple clamp pinch bolts and torque to OEM manufacturer's specifications. This will ensure you maintain a 1/4-inch of preload on the TRIO shock when installed. Next, bleed off the air pressure in the main chamber of the TRIO shock until you can compress the shock enough to line up the lower eyelet of the shock with the mounting hole of the spindle block. Insert the M10 x 1.5-inch rear spindle block bolt (C) when aligned and tighten the nut (D). Torque to 40 ft-lbs (50 Nm).

Ensure the TRIO shock has a minimum of a 1/4-inch preload when installed. The TRIO shock can become damaged if the shock tops out before the motorcycle forks do at full extension during riding.

TRIO

You can view the full TRIO installation instructions, which include the spare kits that replacement parts can be found in. The TRIO front shock is part number 2883316.

To change the air pressure, first use the supplied shock pump to set the air pressure in the EVOL chamber. To do, 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 settings 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 pressures. 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, consult your Timbersled Owner's Manual.
To find a Timbersled Dealer near you, use the Dealer Locator.

Honda® is a registered trademark of Honda Motor Company, Ltd.
Husqvarna® is registered to Husqvarna Aktiebolag
Kawasaki® is a registered trademark of Kawasaki Heavy Industries, Ltd.
KTM® is a registered trademark of KTM Sport Motorcycle AG Corporation
Yamaha® is a registered trademark of Yamaha Hatsudoki Kabushiki Kaisha

Keyword(s) TRIO , shock , install , video , instruction , tune , adjustment