Yamaha YZ125X 2021, Owner'S Service Manual

Page: 83 / 268

CHASSIS
3-19
4. Check:
• Front fork operation
Push down hard on the handlebar several
times and check if the front fork rebounds
smoothly.
Unsmooth operation

Correct or replace.
Refer to “FRONT FORK” on page 4-38.
5. Check:
•
Protector guide “1”
Out of specification

Replace.
TIP
The protector guide reaches the limit of its use
when it is worn down to the same height “a” as
of the outer tube circumference.
6. Remove:
• Protector
•
Dust seal “1”
NOTICE
ECA24330
Be careful not to damage the dust seal and
the inner tube by a driver.
7. Clean:
•
Dust seal “a”
• Oil seal “b”
TIP
•
Clean the dust seal and oil seal after every run.
• Apply lithium-soap-based grease on the inner
tube.
EAM30239
ADJUSTING THE FRONT FORK LEGS
WARNING
EWA19180
• Always adjust the left and right front forks
evenly. If this is not done, the vehicle may
have poor stability.
• Securely support the vehicle so that there
is no danger of it falling over.
Rebound damping
NOTICE
ECA24340
Do not turn the adjuster forcibly beyond its
adjusting range.
1. Adjust:
•
Rebound damping
a. Turn the adjuster “1” in the direction of “a”
or “b” to make an adjustment.
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
1
a
1
Direction “a”
Rebound damping is increased (sus-
pension is harder).
Direction “b”
Rebound damping is decreased (sus-
pension is softer).
Rebound damping
Minimum (soft)
20 click(s) in direction “b”*
Standard
11 click(s) in direction “b”*
Maximum (hard)
0 click(s) in direction “b”*
* With the adjusting screw fully turned in di-
rection “a”
LS
a
b