Checking The Wheel Bearings; Checking The Swingarm Operation; Adjusting The Drive Chain Slack - Yamaha YZF-R1B 2012 Service Manual

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EAS14B1089

CHECKING THE WHEEL BEARINGS

The following procedure applies to all of the
wheel bearings.
1. Check:
• Wheel bearings
Refer to "CHECKING THE FRONT
WHEEL" on page 4-19 and "CHECKING
THE REAR WHEEL" on page 4-28.
EAS14B1090

CHECKING THE SWINGARM OPERATION

1. Check:
• Swingarm operation
Swingarm not working properly → Check
the swingarm.
Refer to "SWINGARM" on page 4-80.
2. Check:
• Swingarm excessive play
Refer to "SWINGARM" on page 4-80.
EAS21390

ADJUSTING THE DRIVE CHAIN SLACK

TIP
The drive chain slack must be checked at the
tightest point on the chain.
ECA13550
A drive chain that is too tight will overload
the engine and other vital parts, and one
that is too loose can skip and damage the
swingarm or cause an accident. Therefore,
keep the drive chain slack within the speci-
fied limits.
1. Stand the vehicle on a level surface.
EWA13120
WARNING
Securely support the vehicle so that there
is no danger of it falling over.
email: info@motomatrix.co.uk
PERIODIC MAINTENANCE
TIP
Place the vehicle on a suitable stand so that
the rear wheel is elevated.
2. Move the rear wheel several times and find
the tightest position of drive chain.
3. Check:
• Drive chain slack "a"
Out of specification → Adjust.
Drive chain slack (when adjust-
ing the drive chain)
25.0–35.0 mm (0.98–1.38 in)
Drive chain slack (when replac-
ing
sprocket)
20.0–30.0 mm (0.79–1.18 in)
4. Loosen:
• Wheel axle nut "1"
5. Adjust:
• Drive chain slack
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Loosen both locknuts "1".
b. Turn both adjusting bolts "2" in direction "a"
or "b" until the specified drive chain slack is
obtained.
Direction "a"
Drive chain is tightened.
Direction "b"
Drive chain is loosened.
3-21
the drive chain and