Yamaha MM700A Manual page 193

set, alignment and parallelism. Different alignment bars
are used for the various models. Check with a Yamaha
dealership for the availability of the correct alignment bar
for the appropriate model.
WARNING
Never lean into the snowmobile's engine
compartment while wearing a scarfor other
loose clothing when the engine is running or
when starting the engine. I f the scurf or
clothing should catch in the drive belt or
clutch, severe injury or death could occur.
1. Open the hood.
2. Remove the cover from the primary sheave, belt and
secondary sheave.
3. Check the drive belt for the manufacturer's marks so
that during installation it will
If the belt is not marked, draw an arrow on the belt facing
forward or install a new belt.
4. Push against the secondary sheave (Figure 7), rotating
it clockwise to separate the sheave halves. Then roll the
5. Inspect the drive belt as described in this chapter.
run
in the correct direction.
6. Perform the drive belt alignment procedure as de-
scribed in this chapter.
7. Reverse Steps 1-4 and install the drive belt. If install-
ing the original belt, be sure to install it so the manufac-
turer's marks on the belt (or those made before removal)
face in the same direction (forward). When installing a
new belt, install it so the belt identification marks are visi-
ble while standing on the left side of the machine looking
into the engine compartment.
Inspection
Check the drive belt frequently and at least once each
season remove the belt and carefully inspect it.
1. Remove the drive belt as described in this chapter.
2. Measure the width of the drive belt at its widest point
(Figure 8). Replace the belt if the width is less than the
minimum listed in Table 2.
measure (Figure 9). Replace the belt if the outside cir-
cumference is not within the limits listed in Table 2.
4. Inspect the belt as follows:
a. Check the sides of the belt for a frayed edge cord
(Figure 10). This indicates drive belt misalignment.
Drive belt misalignment can be caused by incorrect
sheave alignment and loose engine mounting bolts.
in one section (Figure 11) than the rest of the belt.
This condition is caused by excessive belt slippage
because of a stuck track or to abnormally high en-
gine idle speed.
caused by excessive belt wear or misalignment.
Disintegration can also be caused by the use of an
incorrect belt.