Polaris 850 PRO-RMK 155 2.6" QD 2021, Manual

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3.80
9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
PISTON RING MARKINGS
The pistons rings are directional. Piston rings should be
installed with T marking and beveled side up.
PISTON RING INSTALLED GAP
NOTICE
A difference in end gap indicates cylinder taper. The
cylinder should be measured for excessive taper and
out-of-round. Replace rings if the installed end gap
exceeds the service limit. Always check piston ring
installed gap after re-boring a cylinder or when installing
new rings.
1. Position the ring
q
0.79 in (20 mm) from the top of
the cylinder using the piston to push it squarely into
place.
2. Position the ring below the transfer port using the
piston to push it squarely into place.
MEASUREMENT
Piston Ring Installed Gap:
0.016 - 0.020 in (0.40 - 0.50 mm)
NOTICE
Piston rings should be installed with marking or beveled
side up.
ENGINE / COOLING / EXHAUST