Front Suspension Adjustments

Content Source: 2021 600R Owner’s Manual (9931266 Rev 01) > 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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Front Suspension Adjustments

Independent Front Suspension (IFS)

Break in the suspension for about 150 miles (240 km) before making any fine-tuning adjustments.

Settings will vary from rider to rider, depending on rider weight, vehicle speed, riding style, and trail conditions. We recommend starting with factory settings and then customizing each adjustment individually to suit rider preference. The machine should be methodically tested, one change at a time, under the same conditions (trail and snow conditions, vehicle speed, riding position, etc.) after each adjustment until the best ride is achieved.

Shock Spring Preload

Increasing spring preload will increase ski-to-ground pressure. Decreasing spring preload will decrease ski-to-ground pressure. When adjusting, be sure the springs on both the left and right sides of the machine are at the same adjustment.

To change front shock spring preload, loosen the allen bolt in the spring nut . Grasp the spring nut and rotate it. Torque the allen bolt to specification.

TORQUE
Spring Nut Allen Bolt 1.3 Nm

Increasing the spring preload too much may adversely affect the handling of the snowmobile and the performance of the suspension. Never exceed a half inch (.500") of preload beyond the factory settings, and ensure that both sides are adjusted the same. When decreasing preload, make sure at least two turns of preload are holding the spring between the retainer on the top of the shock and the threaded spring preload adjuster nut on the shock body. Failure to do so could cause the retainer to fall off when the suspension is fully extended.

TIP

Not all models have shocks with thread-adjustable spring preload. See your dealer for more information.

NOTICE

On some models equipped with a plastic adjuster nut, the nut will break if it is unscrewed from the threaded body. Do not force the nut if resistance suddenly increases while you’re turning it.

Shock Valving (Walker/Evans Shocks)

These shocks can be revalved if spring preload alone isn’t sufficient and further adjustment is desired to control suspension stiffness.

WARNING

Changing shock valving requires special tools and a sound knowledge of mechanical theory, tool use, and shop procedures to perform the work safely and correctly. Shocks contain high-pressure nitrogen gas. Use extreme caution when handling high-pressure service equipment. We recommend that this work be performed by a POLARIS dealer.

Compression Damping

High Speed Compression Adjustment

Increase the high compression damping force by turning the adjuster clockwise to increase the stiffness. Decrease the high compression damping force by turning the adjuster counter-clockwise to increase the softness. The maximum adjustment for this adjuster is the fully turned in position. The minimum adjustment is 22 clicks out from the maximum position.

Standard Position
High speed adjuster	15 clicks out from fully turned in position

caution

Do not turn the adjuster past the minimum or maximum adjustment. The adjuster may be damaged.

Low Speed Compression Adjustment

Increase the low compression damping force by turning the adjuster clockwise to increase the stiffness. Decrease the low compression damping force by turning the adjuster counter-clockwise to increase the softness. The maximum adjustment for this adjuster is the fully turned in position. The minimum adjustment is 28 clicks out from the maximum position.

Standard Position
Low speed adjuster	10 clicks out from fully turned in position

caution

Do not turn the adjuster past the minimum or maximum adjustment. The adjuster may be damaged.

Rebound Damping Force Adjustment

Increase the rebound damping force by turning the adjuster clockwise to increase the stiffness. Decrease the rebound damping force by turning the adjuster counter-clockwise to increase the softness. The maximum adjustment for this adjuster is the fully turned in position. The minimum adjustment is 16 clicks out from the maximum position.

Standard Position
Rebound adjuster	14 clicks out from fully turned in position

caution

Do not turn the adjuster past the minimum or maximum adjustment. The adjuster may be damaged.

Front Springs

For models without externally adjustable or revalvable shocks, the front springs can be changed if the spring preload alone isn’t sufficient and further adjustment is desired to control suspension stiffness. See your POLARIS dealer for more information.