Checking The Fan Belt Deflection - Yamaha VK540V Owner's Manual

Remember:
less air at higher altitude means there is less horsepower
available, even with proper carburetion. Expect accelera-
tion and top speed to be reduced at higher altitudes.
To overcome operating with less power at high altitudes,
your snowmobile may also require different settings for
the drive chain gears and V-belt clutch to avoid poor per-
formance and rapid wear. If you plan to operate your
snowmobile at an altitude different from the area where
you bought it, be sure to consult a Yamaha dealer. They
can tell you if there are any changes necessary for the
altitude where you plan to ride.
NOTICE
@
The drive chain gears and V-belt clutch should be
adjusted when operating over a high altitude of
900 m (3,000 ft). Consult a Yamaha dealer.
@
ESU01623

Checking the fan belt deflection

1. Remove the fan belt cover by removing the bolts.
805-081
2. Measure the fan belt deflection by applying 50 N
(5 kgf, 11 lbf) of force at the center of belt.
1 Deflection
2 50 N (5 kgf, 11 lbf)
Standard belt deflection:
8 mm (0.31 in) / 50 N (5 kgf, 11 lbf)
3. Install the fan belt cover by installing the bolts.
If the deflection exceeds the specification, consult a
Yamaha dealer.
8-9