2007 Polaris Two Stroke Snowmobile Workshop Repair manual, Page 229Get this manual
REAR SUSPENSION M-10 FRA Initial Set Up Reference M-10 Rear Spring Preload
If FRA position alone does not allow the setup of the proper amount of sag, the center retainer of the rear track shock can be replaced with optional retainers to adjust the preload and change the sag
Optional Retainers
Retainer insert Part Number Retainer part Number 5135077 (stdon M10128) The FRA setting is the primary rear suspension adjustmentIt will have the MOST effect on the rear suspension performanceTo adjust the FRA:Refer to the initial set-up reference chart to determine the desired FRA position2To adjust, loosen the hex bolts attaching the rear lower shock cross shaft to the rail beam3Using 916" wrench, loosen the jam nuts on the preload bolts4Adjust the preload bolts to the desired FRA position5Tighten the jam nutsNOTE: Make sure the preload bolt contacts the slide block before tightening the jam nut6Tighten the hex bolts and torque to 35 ftlbs(47 N-m) NOTE: When the M-10 suspension is new, it will take from 25 to 200 miles (40-300 km) to properly break in the springs and shocks, at which time the suspension will be softer and may require FRA readjustment15436109 5134923 5135080 (stdon M10136) Preload Least Middle Most Sag Most Middle Least