Yamaha YZ450FX 2023, Owner'S Manual

Page: 76 / 164

CHASSIS
3-28
TIP
To obtain a precise adjustment, it is advisable to
check the actual total number of turns of the
damping force adjusting mechanism. This ad-
justment range may not exactly match the spec-
ifications listed due to small differences in
production.
Compression damping (for slow compres-
sion damping)
NOTICE
ECA24390
Do not turn the adjuster forcibly beyond its
adjusting range.
1. Adjust:
• Compression damping (for slow compression
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
be advisable to check the number of clicks of
each damping force adjusting mechanism and
to modify the specifications as necessary.
EAM30240
CHECKING THE SWINGARM OPERATION
1. Check:
• Swingarm smooth action
•
Swingarm free play
Refer to “SWINGARM” on page 4-30.
EAM30500
LUBRICATING THE SWINGARM PIVOT
1. Lubricate:
•
Oil seal
• Collar
EAM30243
CHECKING THE TIRES
1. Measure:
• Tire pressure
Out of specification

Regulate.
Fast compression damping
Minimum (soft)
2 turn(s) in direction “b”*
Standard
1-1/8 turn(s) in direction “b”*
Maximum (hard)
0 turn(s) in direction “b”*
* With the adjusting screw fully turned in di-
rection “a”
Direction “a”
Compression damping is increased
(suspension is harder).
Direction “b”
Compression damping is decreased
(suspension is softer).
1 1
a a
b b
Slow compression damping
Minimum (soft)
20 click(s) in direction “b”*
Standard
10 click(s) in direction “b”*
Maximum (hard)
0 click(s) in direction “b”*
* With the adjusting screw fully turned in di-
rection “a”
Recommended lubricant
Lithium-soap-based grease
1 1
a a
b b