Yamaha VK PROFESSIONAL-II 2016 Owner's Manual page 64

Periodic maintenance and adjustment
New V-belt width:
34.5 mm (1.36 in)
V-belt wear limit width:
32.5 mm (1.28 in)
3. Install the drive guard and close the
shroud.
To replace and adjust the V-belt
EWS00412
WARNING
When installing a new V-belt, make sure
that it is positioned properly. Otherwise,
the V-belt clutch engagement speed will
be changed and the snowmobile may
move unexpectedly when the engine is
started, which could cause an accident.
ECS00512
NOTICE
As the V-belt wears, the position of the V-
belt will change. If the V-belt position is
out of specification, it must be adjusted to
ensure proper clutch performance.
Have a Yamaha dealer make this adjust-
ment.
1. Place the snowmobile on a level surface
and apply the parking brake.
2. Open the shroud, and then remove the
drive guard. (See page 21 for drive guard
removal procedures.)
3. Rotate the secondary sliding sheave
clockwise and push it so that it separates
from the secondary fixed sheave.
56
1. Secondary sliding sheave
2. Secondary fixed sheave
4. Pull the V-belt up over the secondary
fixed sheave.
1. V-belt
5. Remove the V-belt from the secondary
sheave assembly and primary sheave
assembly.
6. Temporarily install the new V-belt on the
secondary sheave assembly only, and
then measure the V-belt position. Do not
force the V-belt between the sheaves;
the secondary sliding and fixed sheaves
must touch each other.