Yamaha YZ 2019 Series, Owner'S Service Manual

Page: 195 / 398

CHAIN DRIVE
4-67
c. After riveting, make sure the space “c”, which
is inside of the connecting link “3” and inside
of the connecting plate “1”, is 14.1–14.3 mm
(0.56–0.65 in).
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2. Lubricate:
•
Drive chain
3. Install:
•
Drive sprocket
• Lock washer
•
Drive sprocket nut
Refer to “ENGINE REMOVAL” on page 5-1.
NOTICE
ECA14300
Never install a new drive chain onto worn
drive chain sprockets; this will dramatically
shorten the drive chain’s life.
4. Adjust:
• Drive chain slack
Refer to “ADJUSTING THE DRIVE CHAIN
SLACK” on page 3-27.
NOTICE
ECA24590
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-
arm or cause an accident. Therefore, keep
the drive chain slack within the specified lim-
its.
Recommended lubricant
Chain lubricant suitable for O-
ring chains
Drive sprocket nut
75 N·m (7.5 kgf·m, 55 lb·ft)
New
T
R
.
.
Drive chain slack (Maintenance
stand)
50.0–60.0 mm (1.97–2.36 in)