Adjust drive belt height using Allen
screws. Loosen jam nuts then turns
Allen screws.
mmr2007-201-006_a
– To lower belt in driven pulley: turn
Allen screws clockwise.
– To raise belt in driven pulley: turn
Allen screws counterclockwise.
NOTE: Turn Allen screws 1/4 turn at a
time, then rotate driven pulley to allow
drivebelttosettleinpulley. Check
height, repeat as required.
NOTE: Allen screws must be re-
strained while tightening jam nut to
prevent throwing adjustment out.
Drive Pulley Adjustment
WARNING
Remove tether cord cap (DESS
key) before performing any main-
tenance or adjustment, unless
otherwise specified. Vehicle must
be parked in a safe place, away
from the trail.
The drive pulley is factory calibrated to
transmit maximum engine power at a
predefined RPM. Factors such as am-
bient temperature, altitude or surface
condition may vary this critical engine
RPM thus affecting snowmobile effi-
ciency.
This adjustable drive pulley allows set-
ting maximum engine RPM to main-
tain maximum power.
Calibration screws should be adjusted
so that actual maximum engine RPM
matches the maximum horsepower
RPM.
ENGINE
MAXIMUM
HORSEPOWER RPM
550F 6900 RPM (± 100)
600 7000 RPM (± 100)
600 HO SDI 8000 RPM (± 100)
V800 7250 RPM (± 100)
NOTE: Use precision digital tachome-
ter for engine RPM adjustment.
NOTE: The adjustment has an effect
on high RPM only.
To adjust, turn calibration screws.
Calibration screw has a notch on top
of its head.
1
A33D19A
TYPICAL
1. Notch
There are 6 positions numbered 1 to
6. On TRA drive pulley, note that in
position 1 the number is substituted
by a dot (due to its location on casting).
A16D0GA
1
TYPICAL — TRA DRIVE PULLEY
1. Position 1 (not numbered)
102
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