Front Arm Limiter Straps; Rear Arm Shock Spring (M/Xf); Adjusting Rear Arm Coupler; Rear Arm Spring Tension - Arctic Cat Sno Pro 120 Service Manual

FRONT ARM LIMITER STRAPS

Under no circumstances should the front arm limiter
strap be lengthened. If lengthened, it may cause shock
absorber travel problems.
The two limiter straps can be shortened to suit driving
style and some test driving time. With the rear arm in its
present mounting location, no advantage has been noted
from changing the strap length. If the front arm straps are
shortened, the result will be more ski pressure and
aggressive steering.

REAR ARM SHOCK SPRING (M/XF)

Proper adjustment of rear arm shock absorber spring pre-
load is necessary to get the most desirable ride.
The rear arm shock spring is adjustable for the terrain con-
ditions and driving style and weight of the operator. The
spring adjuster nut has been set at the factory so the cor-
rect amount of threads are exposed between the adjuster
nut and the threaded shock body as an initial setting.
Rear spring pre-load adjustment is accomplished by loos-
ening the adjuster nut locking collar (B) from the adjuster
nut (A) and using the Spring Adjuster Tool from the tool
kit, rotating the adjuster nut in whichever direction is
desired. Tighten the locking collar against the adjuster nut.

REAR ARM SPRING TENSION

(Bearcat/F/F-Series/T-Series)
The rear spring tension is adjusted for the weight of the
driver. Three possible adjustments exist.
1st block position - set for up to 150 lb
2nd block position - set for 150 to 200 lb
3rd block position - set for over 200 lb
7-4
 NOTE: When making any changes to the front or
rear suspension, the change should be made at both
ends to keep the suspension balanced. For example,
installing stiffer springs in front may require install-
ing the next step stiffer spring in back to keep every-
thing in balance.

ADJUSTING REAR ARM COUPLER

The rear arm coupler provides advantages over the stan-
dard suspension.
First, with the coupler system, ski lift under acceleration is
greatly reduced which provides improved handling. Sec-
ond, when riding through rough terrain, the rear suspension
arm receives some needed assistance from the front arm
shock and spring as the rear arm is fully collapsed and
locked up by the coupler blocks. The front arm then starts
to collapse the shocks and spring which assist the rear
springs. The result is a smoother ride for the operator.
If additional coupler action is desired, the coupler blocks
can be set to the number 2 or 3 position. Each of the cou-
pler blocks has three positions numbered on the inside
surface of the block. When changing the block position,
change both to the same number. To make the coupler
adjustment, follow the procedure below.
1. Loosen the two cap screws that secure the coupler
blocks to the inside of the suspension rails.
2. Rotate the coupler blocks to the desired position
making sure both are set the same.
0745-159
3. Place a 4-in. block of wood under the rear of the sus-
pension just in front of the rear idler wheels to assist
in collapsing the suspension.
4. Collapse the rear suspension until the rear arm is
firmly against the coupler blocks aligning the two
blocks squarely with the arm. While in this position,
tighten the two cap screws securely.
727-720A
738-230A