8.9
FRONT SUSPENSION & STEERING
8
SPRINGS
Two types of springs are employed in Polaris suspensions, coil springs and torsion springs. Following is some of the terminology
used when referring to coil springs.
• Free length - the length of a coil spring with no load applied to the spring
• Installed length - the length of the spring between the spring retainers. If the installed length of the spring is less than the
free length, it will be pre-loaded.
• Spring rate - the amount of force required to compress a coil spring one inch. For example, if 150 pounds of force are
required to compress a spring 1 inch, the spring rate would be 150 #/in.
• Straight rate spring - the spring requires the same amount of force to compress the last one inch of travel as the first one
inch of travel. For example, if a 150 #/in. spring requires 150 pounds of force to compress it one inch, 300 pounds of force
would compress it two inches, 450 pounds of force would compress it three inches, etc.
• Progressively wound spring - the rate of the spring increases as it is compressed. For example, a 100/200 #/in. rate spring
requires 100 pounds of force to compress the first one inch, but requires 200 additional pounds to compress the last one
inch.
When a bump is encountered by the suspension, the force of the bump compresses the spring. If the force were 450 pounds, a 100
#/in. spring would compress 4.5 inches. A 150 #/in. spring would only compress 3 inches. If the suspension had 4 inches of spring
travel the 100 #/in. spring would bottom out, while the 150 #/in. spring would have one inch of travel remaining.
COMPRESSION DAMPING ADJUSTABLE SHOCKS
Snowmobiles equipped with the Indy Select or Ryde FX shocks allow the driver to make adjustments to the compression valving
by turning the screw located near the base of the shock.
Locate the adjustment screw near the base of the shock.
By turning the screw clockwise (a small screwdriver or dime work well), the compression valving is increased, stiffening the ride.
To soften the ride, reduce the compression by turning the screw counter-clockwise. A great deal of ride performance is accomplished
with a mere 1/2 to 1 turns. There are approximately 3 full turns of adjustment available.
7041820 5.98 140 4 .250 1.89 2.43 No
7041821 5.91 160 4 .262 1.89 2.49 No
7041826 9.19 160 7 .306 1.89 2.54 No
7041826 8.85 180 7 .312 1.89 2.54 No
7041828 9.61 200 7 .331 1.89 2.59 No
7041829 8.92 220 7 .331 1.89 2.59 No
7041927 16.15 68/160 13 .295 1.89 2.54 Yes
7041950 13.80 68/160 11.57 .331 1.89 3.125 Yes
7042052 11.7 110 12 0.343 1.87 3 NO
7042074 11.625 90/180 Var 10.65 0.343 1.89 3.2 YES
7042187 13.76 68/160 12.55 0.343 1.89 3.18 YES
7042195 14 90/180 Var 13 0.362 1.89 3.2 YES
7042263 8.67 80/110 Var 10.78 0.331 1.89 3.25 YES
7042314 10.64 75 10.01 0.281 1.89 2.71 YES
7042315 10.89 55 9.85 0.262 1.89 2.66 YES
IFS Shock Springs
PART
N
UMBER
TOTAL # OF
C
OILS
RATE #/IN)
FREE
L
ENGTH
WIRE VIA. I.D." O.D.” TABBED?
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