Yamaha YZ450F Manuel D'atelier Du Proprietaire page 218

FRONT FORK INSPECTION
3. Adjust:
Drive chain slack
G
Drive chain slack adjustment steps:
Loosen the axle nut 1 and locknuts 2.
G
Adjust chain slack by turning the adjusters
G
3.
To tighten → Turn adjuster 3 counter-
To loosen → Turn adjuster 3 clockwise
Turn each adjuster exactly the same
G
amount to maintain correct axle alignment.
(There are marks a on each side of chain
puller alignment.)
NOTE:
Turn the adjuster so that the chain is in line
with the sprocket, as viewed from the rear.
CAUTION:
Too small chain slack will overload the
engine and other vital parts; keep the
slack within the specified limits.
Tighten the axle nut while pushing down
G
the drive chain.
Tighten the locknuts.
G
EC36C000
FRONT FORK INSPECTION
1. Inspect:
Front fork smooth action
G
Operate the front brake and stroke the
front fork.
Unsmooth action/oil leakage → Repair
or replace.
3 - 33
INSP
ADJ
clockwise.
and push wheel forward.
Axle nut:
125 Nm (12.5 m • kg, 90 ft • lb)
Locknut:
16 Nm (1.6 m • kg, 11 ft • lb)