2007 Polaris Two Stroke Snowmobile Workshop Repair manual, Page 42Get this manual
GENERAL Suspension Spring Pre-LoadInstalled Length
When installing springs on shocks the specifications will call out "Installed Length" or "Pre-Load"Installed Length is the length of the spring from end to end when it is ready to be installed on the snowmobileYou should adjust the spring preload ring until you reach your specified spring installed lengthPre-Load is the amount of space that you have from the bottom of the spring preload adjuster to the top of the spring retainerPreload