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9924871 R03 - 2014 Polaris Sportsman® 570 EFI Service Manual
© Copyright 2013 Polaris Sales Inc.
Piston-to-Cylinder Clearance
1.
Measure the outside diameter of the piston 12 mm
from the skirt and at a right angle to the direction of
the piston pin (Item 1).
2.
Subtract this measurement from the maximum
cylinder size measurement from cylinder inspection.
Piston to Cylinder Clearance:
.00019 - .00216″ (.005 - .055 mm)
Piston O.D.:
3.8957 - 3.8968″ (98.953 - 98.980 mm)
Piston / Rod Inspection
1.
Measure piston pin bore inside diameter I.D.(Item 1).
Piston Pin Bore:
Std.: 0.8662 - 0.8665″ (22.004 - 22.010 mm)
Service Limit: 0.8651″ (21.975 mm)
2.
Measure piston pin O. D (2). Replace piston and/or
piston pin if out of tolerance.
Piston Pin O.D.:
Std.: 0.8659 - 0.8661″ (21.995 - 22.0 mm)
Service Limit: 0.8651″ (21.975 mm)
3.
Measure connecting rod small end ID. Inspect
bearing surface for damage.
Piston Pin Degree of Fit:
Pin should be a push-fit by hand with piston at
room temperature or warmed slightly
Connecting Rod Small End ID:
Std.: 0.8665 - 0.8670″ (22.010 - 22.023 mm)
ENGINE
