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THE PERFECT FIT
FAST M-10 Rear Suspension Adjustments
More M-10 Suspension Ride and Performance Settings
Overload Spring
The overload spring is located inside the main rear spring. Contact is
made with this spring only when the crossover tube comes in contact
with it toward the end of the travel, which reduces bottoming of t he
rear suspension. The correct setting of the crossover tube length
enables the M-10 suspension to deliver superior performance in
“bottoming” situations. This adjustment has no effect on spring
pre-load or general ride characteristics of the M-10 rear suspension, it
affects only bottoming resistance. To adjust the crossover tube length
(dimension C in illustration and set-up chart):
1. Use the spanner wrenches located in the tool kit to unlock the
upper lock nut from the adjuster collar.
2. Turn the adjuster collar to the appropriate or desired dimension for
the rider’s weight (refer to the initial set-up reference chart located
under t he hood of your snowmobile and on page 49). Using the
spanner wrenches, tighten the upper lock nut firmly against the
adjuster collar.
Optional Springs
Optional springs have been designed to allow adaptation of the M-10
suspension to your specific needs. The 140 lbs./in. optional front arm
spring would be used when very light load conditions exist, such as
operation on very smooth t rails, in deep powder or by very light riders.
The 300 lbs. /in. rear arm spring option would be used when high l oad
conditions exist, such as operation by heavy riders on rough trails or
very aggressive riding. The available springs for M-10 suspension are
listed below.
Location Spring Rate Polaris PN
Front Arm Standard
Front Arm Soft
Front Arm Firm
160 lbs./in.
140 lbs./in.
180 lbs./in.
7041671-216
7041677-067
7041672-067
Rear Arm Standard
Rear Arm Soft
Rear Arm Firm
210/278 lbs./in.
135/240 lbs./in.
300 lbs./in.
7041935-216
7042010-216
7042011-067
Overload 1000 lbs./in. 7041936-067