If I understand your description of the spring correctly, then those notches are where you can adjust your spring tension, thereby giving you a stiffer suspension. I am not exactly sure which Skandic you have, but you can check this link and navigate to your particular model to check the part. At the link below, the notches would be #21. If you turn those notches to a wider notch, then the lower portion of your spring would sit higher (further from the track), giving you the lift you are looking for. You should be able to do this with a wrench as the notches should have a plastic nut on them ... just remember to adjust both the left and right sides equally.
I though that the rear adjustment on the rear suspension was for rider weight? I think thats how it is on my safari anyways. With two people on my sled i tighten up the rear spring at the back of the skid and it improves the ride. Maybe it will be the same for yours.
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