Checking The Drive Sprocket; Checking The Rear Wheel Sprocket; Installing The Drive Chain - Yamaha YZ 2018 Series Owner's Service Manual

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4. Check:
• O-rings "1"
Damage  Replace the drive chain.
• Drive chain rollers "2"
Damage/wear  Replace the drive chain.
• Drive chain side plates "3"
Damage/wear  Replace the drive chain.
5. Lubricate:
• Drive chain
Recommended lubricant
Chain lubricant suitable for O-
ring chains
EASB29B195

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.
b. Correct
1. Drive chain roller
2. Drive sprocket
EASB29B196

CHECKING THE REAR WHEEL SPROCKET

Refer to "CHECKING AND REPLACING THE
REAR WHEEL SPROCKET" on page 4-8.
EASB29B197

INSTALLING THE DRIVE CHAIN

1. Install:
• Drive chain
ECA
NOTICE
Be sure to put on safety goggles when
working.
TIP
Install the drive chain joint with the drive chain
cut & rivet tool. (Use goods on the market)
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a. When press fitting the connecting plate "1",
make sure the space "a" between the end of
the connecting pin "2" and the connecting
plate is 1.2–1.4 mm (0.05–0.06 in).
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CHAIN DRIVE