Yamaha SR1NLK Operator's Manual page 33

Also, new drive belts have a break-in
period of approximately 40 km (25 miles).
After installing a new drive belt, drive the
snowmobile for 40 km (25 miles) at 3/4
throttle or less. By revving the engine up
and down (but not exceeding 97 km/h [60
mph]), the exposed cord on the side of a
new belt will be worn down. This allows
the drive belt to gain its optimum flexibil-
ity and will extend drive belt life.
CAUTION
Never run the engine with the drive belt
removed. Excessive revving of the
engine could result in serious engine
damage and drive clutch failure.
Removing Drive Belt

NOTE: Changing a drive belt can be
done by the snowmobile owner if qual-
ified to do so. If the owner does not
feel qualified, take the snowmobile to
an authorized Yamaha Snowmobile
dealer for this service. This service is
at the discretion and expense of the
snowmobile owner.
1. Place the snowmobile on a level sur-
face and engage the brake lever
lock.
2. Open the left-side access panel and
remove the belt guard assembly.
3. Rotate the driven clutch sliding
sheave clockwise (1); then push
toward the engine (2) so it will sepa-
rate from the fixed sheave.
4. Remove the drive belt by pulling it
up and over the fixed sheave.
Installing Drive Belt

NOTE: Before installing the drive
belt, use a suitable cleaning solvent
to thoroughly clean the sheaves.
1. Open the left-side access panel.
2. Rotate the driven clutch sliding
sheave clockwise (1); then push
toward the engine (2) so it will sepa-
rate from the fixed sheave.
3. Install the drive belt (3) between the
sheaves.
4. Install the left-side access panel.
Never operate the snowmobile without
the access panel secured in place.
SNO-336
! WARNING
SNO-326
SNO-327
31