Yamaha YZ125 2021 - Adjusting the Rear Shock Absorber Assembly; Checking the Rear Shock Absorber Assembly

CHASSIS
3-20
TIP
Although the total number of clicks of a damping
force adjusting mechanism may not exactly
match the above specifications due to small dif-
ferences in production, the actual number of
clicks always represents the entire adjusting
range. To obtain a precise adjustment, it would
be advisable to check the number of clicks of
each damping force adjusting mechanism and
to modify the specifications as necessary.
Air bleeding from front fork
TIP
If the front fork initial movement feels stiff during
a run, relieve the front fork internal pressure.
1. Use a maintenance stand to raise the front
wheel off the ground.
WARNING
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
2. Remove the bleed screw “1” and release the
internal pressure from the front fork.
3. Tighten:
• Bleed screw
EAM30482
CHECKING THE REAR SHOCK ABSORBER
ASSEMBLY
1. Stand the vehicle upright on a level surface.
WARNING
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
2. Check:
• Rear shock absorber assembly
Gas leaks/oil leaks  Replace the rear shock
absorber assembly.
Refer to “REAR SHOCK ABSORBER AS-
SEMBLY” on page 4-54.
3. Check:
• Rear shock absorber assembly smooth ac-
tion
• Rear suspension link smooth action
Sit astride the seat and shake your body up
and down several times to check whether the
rear shock absorber assembly operates
smoothly.
Unsmooth operation  Correct or replace.
Refer to “REAR SHOCK ABSORBER AS-
SEMBLY” on page 4-54.
EAM30242
ADJUSTING THE REAR SHOCK ABSORBER
ASSEMBLY
Use a maintenance stand to raise the rear wheel
off the ground.
WARNING
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
Spring preload
NOTICE
ECA24360
Do not turn the adjuster forcibly beyond its
Direction “a”
Compression damping is increased
(suspension is harder).
Direction “b”
Compression damping is decreased
(suspension is softer).
Compression damping
Minimum (soft)
20 click(s) in direction “b”*
Standard
12 click(s) in direction “b”*
Maximum (hard)
0 click(s) in direction “b”*
* With the adjusting screw fully turned in di-
rection “a”
Bleed screw (front fork)
1.3 N·m (0.13 kgf·m, 0.95 lb·ft)
T
R
.
.