Checking The Wheel Bearings; Checking The Swingarm Operation; Lubricating The Swingarm Pivot; Drive Chain Slack - Yamaha MTN850-A 2017 Service Manual

EAS30641

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 4-10 and "CHECKING THE REAR
WHEEL" on page 4-21.
EAS30802

CHECKING THE SWINGARM OPERATION

1. Check:
• Swingarm operation
Swingarm not working properly  Check the
swingarm.
Refer to "SWINGARM" on page 4-79.
2. Check:
• Swingarm excessive play
Refer to "SWINGARM" on page 4-79.
EAS30643

LUBRICATING THE SWINGARM PIVOT

1. Lubricate:
• Oil seals
• Collars
Recommended lubricant
Lithium-soap-based grease
Refer to "INSTALLING THE SWINGARM" on
page 4-81.
EAS31923

DRIVE CHAIN SLACK

Checking the drive chain slack
EWA13120
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
ECA13550
NOTICE
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 swing-
PERIODIC MAINTENANCE
arm or cause an accident. Therefore, keep
the drive chain slack within the specified lim-
its.
1. Shift the transmission into the neutral posi-
tion.
2. Check:
• Drive chain slack "a"
Out of specification  Adjust.
Drive chain slack (Maintenance
stand)
5.0–15.0 mm (0.20–0.59 in)
Drive chain slack (Sidestand)
5.0–15.0 mm (0.20–0.59 in)
ECA20870
NOTICE
Improper drive chain slack will overload the
engine as well as other vital parts of the mo-
torcycle and can lead to chain slippage or
breakage. If the drive chain slack is more
than the specified limit, the chain can dam-
age the frame, swingarm, and other parts. To
prevent this from occurring, keep the drive
chain slack within the specified limits.
Adjusting the drive chain slack
EWA13120
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
1. Loosen:
• Wheel axle nut "1"
3-18
a
1