2007 Polaris Two Stroke Snowmobile Workshop Repair manual, Page 225Get this manual
REAR SUSPENSION Installing Heaviest Springs On IQ 121" Suspension
Please reference the following information when installing heavy torsion springs (70431287043129) on sleds equipped with IQ 121" suspensionsThe issue that arises when installing the heavy spring is that the coil stack of the torsion spring is tall enough to interfere with the suspension arm clamp nutTo work around this issue you will need to order two (one for each side) of the Parts belowYou will also need to relocate the two washers that are next to the clamp nut to the outside of the link arm