Adjusting The Drive Belt Slack - Yamaha XV19SX(C) Service Manual

EAS21430

ADJUSTING THE DRIVE BELT SLACK

NOTE:
The drive belt slack must be checked at the tight-
est point on the belt.
ECA14950
CAUTION:
A drive belt 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 belt slack within the specified lim-
its.
NOTE:
Measure the drive belt slack when the engine is
cold, and when the drive belt is dry.
1. Stand the vehicle on a level surface.
EWA13120
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
NOTE:
Place the vehicle on the sidestand and or on a
suitable stand so that the rear wheel is elevated.
2. Check:
• Drive belt slack "a"
Out of specification → Adjust.
a
Drive belt slack (on the side-
stand)
7.5–13 mm (0.30–0.51 in)
Drive belt slack (on a suitable
stand)
14–21 mm (0.55–0.83 in)
Belt tension gauge
90890-03170
Rear drive belt tension gauge
YM-03170
NOTE:
• The level marks of the level window on the low-
er drive belt cover are in units of 5 mm (0.20 in).
Use them as a standard for measuring the
drive belt slack.
• Measure the drive belt slack when the drive
belt has been pushed with 4.5 kg (10 lbs) of
pressure using a belt tension gauge "1".
1
3. Remove:
• Muffler
Refer to "ENGINE REMOVAL" on page 5-1.
4. Adjust:
• Drive belt slack
M MMM M MMM M M MMM M
NOTE:
Place the vehicle on a suitable stand so that the
rear wheel is elevated.
a. Loosen the wheel axle nut "1".
1
b. Loosen both locknuts "2".
c. Turn both adjusting bolts "3" in direction "a" or
"b" until the specified drive belt slack is ob-
tained.
Direction "a"
Drive belt is tightened.
Direction "b"
Drive belt is loosened.
3-26
CHASSIS
M MMM M M MMM M M MMM M MMM