Service manual

2-43
Test the main jet
(performance & plug color)
Test the low-speed setting
Try high-altitude settings
Decide if the problem is with the
pilot jet and adjust accordingly
Check STD settings
S Carburetors
S Spark plugs
Adjust the main jet size according
to the chart
Adjust the size of the main jet
Check to see if the gearing is too high or low
Check the engagement speed
and shift performance
High altitude
tuning OK
Adjust the secondary clutch as
required
Re-test
OK
OK
OK
OK
OK
OK
OK
OK
Not OK
Adjust the primary clutch as
required
OK
Not OK
Not OK
Not OKNot OK
Not OK
Not OK
Not OK
HIGH ALTITUDE TUNING
INSP
ADJ
ESS00096
HIGH ALTITUDE TUNING
To attain the best performance in high altitude conditions, carefully tune the snowmobile as outlined
below.