Yamaha YZ450FX 2021 Owner's Service Manual page 164

Distance "a"
16 mm (0.63 in) or more
Between the damper assembly
"1" bottom and locknut "2" bot-
tom.
2
1
23.Install:
• Upper spring seat "1"
• Fork spring "2"
(to the damper assembly "3")
TIP
Install the upper spring seat with its larger dia.
end "a" facing the fork spring.
1
3
24.Install:
• Damper assembly "1"
(to the inner tube "2")
ECA24560
NOTICE
Allow the damper assembly to slide slowly
down the inner tube until it contacts the bot-
tom of the inner tube. Be careful not to dam-
age the inner tube.
a
2
a
4-50
1
25.Loosen:
• Rebound damping force adjuster "1"
TIP
• Before loosening the damping force adjuster,
record the setting position.
• Unless the damping force adjuster is fully loos-
ened, correct damping characteristic cannot be
obtained after installation.
26.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
FRONT FORK
2
1