Yamaha YZ450FP 2023 Owner's Service Manual page 171

• Unless the damping force adjuster is fully loos-
ened, correct damping characteristic cannot be
obtained after installation.
25.Install:
• Damper adjusting rod "1"
• Copper washer "2"
New
• Adjuster "3"
(to the damper assembly "4")
TIP
• While compressing the inner tube "5", set the
cap bolt ring wrench "7" between the inner tube
and locknut "6".
• Fully finger tighten the adjuster onto the damp-
er assembly.
Cap bolt ring wrench
90890-01501
Cap bolt ring wrench
YM-01501
26.Measure:
• Gap "a" between the adjuster "1" and the
locknut "2"
Out of specification  Retighten and readjust
the locknut.
Gap "a" between the adjuster and
the locknut
0.5–1.0 mm (0.02–0.04 in)
TIP
If it is installed with a gap out of specification,
correct damping force cannot be obtained.
1
27.Tighten:
• Adjuster (damper assembly) "1"
TIP
Hold the locknut "2" and tighten the adjuster.
28.Install:
• Adjuster "1"
(to the inner tube)
29.Fill:
• Front fork leg
4-55
FRONT FORK
1
a
2
Adjuster (damper assembly)
29 N·m (2.9 kgf·m, 21 lb·ft)
Adjuster
55 N·m (5.5 kgf·m, 41 lb·ft)
LOCTITE®
1