The ski shocks have #'s on them. Just turn the spring to a lower # and it will lessen the spring pressure making it softer. The front shock in the rear skid is not numbered, but same thing. Just turn the spring to lessen spring pressure ( righty tighty- lefty loosey ). Lay the sled on its side to adjust this shock. It takes the pressure off the shock and makes turning the spring easier. Rear suspension is adjusted with the torsion spring blocks. If you look at them you will see there are 4 settings. The block has different distances from the center to the face the spring rides on. The smaller the distance the softer the springs. Always turn the block clockwise. There should be a tool in the tool kit for this. It is one end of the spark plug wrench. Just remember these adjustments will affect steering.