Piston Ring Markings; Piston Ring Installed Gap - Polaris 850 MATRYX INDY XC 129 2021 Manual

ENGINE / COOLING / EXHAUST

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.
q
1. Position the ring 0.79 in (20 mm) from the top of
the cylinder using the piston to push it squarely into
place.
3.82
2. Position the ring below the transfer port using the
piston to push it squarely into place.
Piston rings should be installed with marking or beveled
9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
MEASUREMENT
Piston Ring Installed Gap:
0.016 - 0.020 in (0.40 - 0.50 mm)
NOTICE
side up.
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