Polaris 550 Transport Owner's Manual page 38

THE PERFECT FIT
EDGE 136 Rear Suspension Adjustments
Rear Spring Tension
To adjust rear torsion spring tension, rotate the three-position cam using
the engine spark plug tool. Different rate torsion springs are available if
a firmer ride is desired. See your dealer for more information.
The following information is provided only as a guideline to be used for
initial suspension set-up. Your set-up may vary based on your desired
riding style.
Low Tension Medium Tension High Tension
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