Piston Removal - Polaris 2014 Sportsman 570 EF Service Manual

ENGINE
2. Inspect the top of the cylinder for warpage using a
straight edge and feeler gauge.
Cylinder Warpage:
.00098" (.025 mm)
3. Inspect cylinder for wear, scratches, or damage.
4. Inspect cylinder for taper and out of round with a
telescoping gauge or a dial bore gauge. Measure in
two different directions, front to back and side to
side, on three different levels (1/2" down from top, in
the middle, and 1/2" up from bottom).
3.50
5. Record measurements taken in Step 4. If cylinder is

Piston Removal

1. Note piston directional indicator "EX" positioned
2. Remove piston circlip and push piston pin out of
3. CAUTION: Do not apply heat to the piston rings,
4. Remove top ring.
5. Repeat procedure for second ring.
6. Remove oil control ring top rail first, then bottom rail.
7. Remove oil control ring expander.
9924871 R03 - 2014 Polaris Sportsman® 570 EFI Service Manual
© Copyright 2013 Polaris Sales Inc.
tapered, or out of round beyond .001, cylinder must
be re-bored oversize, or replaced.
Cylinder Taper
Limit: .001" Max. (0.025 mm)
Cylinder Out of Round
Limit: .001" Max. (.025 mm)
Standard Bore Size:
3.8976 +/- 0.0003" (99.0 +/- 0.008 mm)
toward the exhaust side of engine.
piston. If necessary, heat the crown of the piston
slightly with a heat gun.
they may lose radial tension.
*Using a piston ring pliers: Carefully expand ring
and lift it off the piston.
CAUTION: Do not expand the ring more than the
amount necessary to remove it from the piston.
*By hand: Placing both thumbs as shown, spread
the ring open and push up on the opposite side.