April 16, 2024

 This shock absorber assembly contains highly pressurized nitrogen gas. Read and understand the following information before handling the shock absorber assembly.

  • Do not tamper with or attempt to open the cylinder assembly.
  • Do not subject the shock absorber assembly to an open flame or other high heat source. This may cause the unit to explode due to excessive gas pressure.
  • Do not deform or damage the cylinder in any way. Cylinder damage will result in poor damping performance.
  • Do not dispose of a damaged or worn-out shock absorber assembly yourself. Take the shock absorber assembly to a Yamaha dealer for any service.
YZF-R1

This model is equipped with adjustable suspension. The spring preload, rebound damping force, fast compression damping force, and slow compression damping force can be adjusted.

To avoid damaging the mechanism, do not attempt to turn beyond the maximum or minimum settings.

Spring preload
  1. Loosen the locknut.

  2. Turn the adjusting nut in direction (a) to increase the spring preload. Turn the adjusting nut in direction (b) to decrease the spring preload.

    The spring preload setting is determined by measuring distance A. The longer distance A is, the higher the spring preload; the shorter distance A is, the lower the spring preload.

    • Use the special wrench included in the tool kit to make the adjustment.
    ZAU0N795.png

    1. Spring preload adjusting nut
    2. Locknut
    3. Special wrench
    ZAU0N796.png

    1. Distance A
    Spring preload:
    Minimum (soft):
    Distance A = 77.5 mm (3.05 in)
    Standard:
    Distance A = 78.5 mm (3.09 in)
    Maximum (hard):
    Distance A = 85.5 mm (3.37 in)
  3. Tighten the locknut to the specified torque. NOTICE: Always tighten the locknut against the adjusting nut, and then tighten the locknut to the specified torque.

    Tightening torque:
    Locknut:
    28 N·m (2.8 kgf·m, 21 lb·ft)
Rebound damping force

Turn the adjusting bolt in direction (a) to increase the rebound damping force.

Turn the adjusting bolt in direction (b) to decrease the rebound damping force.

To set the rebound damping force, turn the adjuster in direction (a) until it stops, and then count the clicks in direction (b).

ZAU0N797.png

  1. Rebound damping force adjusting bolt
Rebound damping setting:
Minimum (soft):
23 click(s) in direction (b)
Standard:
12 click(s) in direction (b)
Maximum (hard):
1 click(s) in direction (b)
  • When turning the damping force adjuster in direction (a), the 0 click position and the 1 click position may be the same.
  • When turning the damping force adjuster in direction (b), it may click beyond the stated specifications, however such adjustments are ineffective and may damage the suspension.
Compression damping force
Fast compression damping force
  1. Turn the adjusting bolt in direction (a) to increase the compression damping force.

    Turn the adjusting bolt in direction (b) to decrease the compression damping force.

    To set the compression damping force, turn the adjuster in direction (a) until it stops, and then count the turns in direction (b).

    ZAU0N798.png

    1. Fast compression damping force adjusting bolt
    Fast compression damping setting
    Minimum (soft):
    5.5 turn(s) in direction (b)
    Standard:
    3 turn(s) in direction (b)
    Maximum (hard):
    0 turn(s) in direction (b)

    When turning the damping force adjuster in direction (b), it may turn beyond the stated specifications, however such adjustments are ineffective and may damage the suspension.

Slow compression damping force
  1. Turn the adjusting bolt in direction (a) to increase the compression damping force.

    Turn the adjusting bolt in direction (b) to decrease the compression damping force.

    To set the compression damping force, turn the adjuster in direction (a) until it stops, and then count the clicks in direction (b).

    ZAU0N799.png

    1. Slow compression damping force adjusting bolt
    Slow compression damping setting
    Minimum (soft):
    18 click(s) in direction (b)
    Standard:
    12 click(s) in direction (b)
    Maximum (hard):
    1 click(s) in direction (b)
    • When turning the damping force adjuster in direction (a), the 0 click position and the 1 click position may be the same.
    • When turning the damping force adjuster in direction (b), it may click beyond the stated specifications, however such adjustments are ineffective and may damage the suspension.
YZF-R1M

This model is equipped with ÖHLINS electronic racing suspension.

Compression damping force and rebound damping force

The compression and rebound damping forces are electronically controlled and can be adjusted from the MENU screen. See ERS on page  for information on how to adjust these settings.

Spring preload

The spring preload adjustment is performed manually.

  1. Loosen the locknut.

  2. Turn the adjusting nut in direction (a) to increase the spring preload. Turn the adjusting nut in direction (b) to decrease the spring preload.

    The spring preload setting is determined by measuring distance A. The longer distance A is, the higher the spring preload; the shorter distance A is, the lower the spring preload.

    • Use the special wrench in the tool kit to make the adjustment.
    ZAU0F377.png

    1. Spring preload adjusting nut
    2. Locknut
    ZAU0N801.png

    1. Distance A
    Spring preload:
    Minimum (soft):
    Distance A = 0.0 mm (0.00 in)
    Standard:
    Distance A = 4.0 mm (0.16 in)
    Maximum (hard):
    Distance A = 9.0 mm (0.35 in)
  3. Tighten the locknut to the specified torque. NOTICE: Always tighten the locknut against the adjusting nut, and then tighten the locknut to the specified torque.

    Tightening torque:
    Locknut:
    25 N·m (2.5 kgf·m, 18 lb·ft)

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