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Checking The Drive Sprocket; Checking The Rear Wheel Sprocket; Installing The Drive Chain - Yamaha YZ250X 2022 Owner's Service Manual

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G088940
G088941
4. Check:
• O-ring "1"
Damage  Replace the drive chain.
• Drive chain roller "2"
Damage/wear  Replace the drive chain.
• Drive chain side plate "3"
Damage/wear  Replace the drive chain.
G088943
5. Lubricate:
• Drive chain
Recommended lubricant
Chain lubricant suitable for O-
ring chains
EAM30077

CHECKING THE DRIVE SPROCKET

1. Check:
• Drive sprocket
More than 1/4 tooth wear "a"  Replace the
drive sprocket and the rear wheel sprocket as
a set.
Bent tooth  Replace the drive sprocket and
the rear wheel sprocket as a set.
G088904
b. Correct
1. Drive chain roller
2. Drive sprocket
EAM30078

CHECKING THE REAR WHEEL SPROCKET

Refer to "CHECKING AND REPLACING THE
REAR WHEEL SPROCKET" on page 4-8.
EAM30079

INSTALLING THE DRIVE CHAIN

1. Install:
• Drive chain
ECA17410
NOTICE
Be sure to put on safety goggles when work-
ing.
TIP
Install the master link with the drive chain cut &
rivet tool. (Use goods on the market.)
a. When press fitting the master link plate
"1", make sure the space "a" between the
end of the connecting pin "2" and the mas-
ter link plate is 1.2–1.4 mm (0.05–0.06 in).
b. After riveting, make sure the diameter be-
tween the edges "b" of the connecting pin
"2" is 5.5–5.8 mm (0.22–0.23 in).
4-64
CHAIN DRIVE

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