Checking The Drive Sprocket; Checking The Rear Wheel Sprocket; Checking The Rear Wheel Drive Hub; Installing The Drive Chain - Yamaha YZF-R125 Service Manual

YamahaR125.COM
L LLL L LLL L L LLL L
3. 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.
Cracks → Replace the drive chain.
4. Lubricate:
• Drive chain
Recommended lubricant
Engine oil or chain lubricant
suitable for O-ring chains
EAS23460

CHECKING THE DRIVE SPROCKET

1. Check:
• Drive sprocket
More than 1/4 tooth "a" wear → Replace the
drive chain sprockets as a set.
Bent teeth → Replace the drive chain sprock-
ets as a set.
L LLL L L LLL L L LLL L
b. Correct
LLL
1. Drive chain roller
2. Drive chain sprocket
EAS23470

CHECKING THE REAR WHEEL SPROCKET

Refer to "CHECKING AND REPLACING THE
REAR WHEEL SPROCKET" on page 4-15.
EAS23480

CHECKING THE REAR WHEEL DRIVE HUB

Refer to "CHECKING THE REAR WHEEL
DRIVE HUB" on page 4-15.
EAS23490

INSTALLING THE DRIVE CHAIN

1. Lubricate:
• Drive chain
• Master link
2. Install:
• Drive sprocket
• Drive sprocket retainer bolts
3. Install:
• Master link
• O-rings
• Master link plate
• Master link clip "1"
ECA14310
CAUTION:
• The closed end of the master link clip must
face in the direction of drive chain rotation.
• Never install a new drive chain onto worn
drive chain sprockets; this will dramatically
shorten the drive chain's life.
4-65
CHAIN DRIVE
New
Recommended lubricant
Engine oil or chain lubricant
suitable for O-ring chains
Drive sprocket retainer bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
New