2010 Polaris Sportsman 850 Service Manual, Page 145Get this manual
ENGINE Connecting Rod Big End Bearing Selection
1If using NEW connecting rods, install the bearing color that matches the color marked on the connecting rod cap as shown below
PistonPiston Ring Inspection
1Measure piston ring to ring land clearance with thickness gauge (A) inserted between bottom edge of ring (B) and piston ring land (C)Replace both piston and rings if clearance exceeds service limitRepeat for 2nd ring
2Paint mark
2If re-installing the original connecting rod, select the appropriate bearing from the table below based on connecting rod big end I.Dmeasurements (page 5.46)Piston Ring Removal
1Carefully remove top compression ring by hand or using ring removal pliers
Bearing Size Selection Chart In Millimeters
Connecting rod journal must be within standard size limits as determined by crankshaft measurements (See page 5.45)Con Rod Mark Con Rod Big End Bore Diameter Target Oil Clearance (Con Rod Bearing) Bearing color to install Red Red White Blue Yellow 47.987mm 47.993mm 47.999mm 48.005mm 47.993mm 47.999mm 48.005mm 48.011mm .023 mm.057 mm White Blue Yellow