3.74
9850068 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual
© Copyright Polaris Industries Inc.
PISTON DISASSEMBLY / INSPECTION
NOTICE
New pistons are directional (intake vs. exhaust), but
can be placed in either cylinder. The arrow will point
towards the exhaust side.
1. Note location of the piston circlip gap
q
at the top
(12:00 position).
2. Remove piston circlips
w
and push piston pin
e
out
of piston. If necessary, heat the crown of the piston
slightly with a heat gun if pin cannot be removed by
hand. Discard circlips.
CAUTION
DO NOT apply heat to piston rings or a loss of radial
tension could result.
3. Measure piston pin bore I.D. in two directions (90°
apart). Replace piston and piston pin if out of
specification.
MEASUREMENT
Piston Pin Bore I.D.:
.8665 - .8668" (22.009 - 22.017 mm)
Service Limit:.8678" (22.042 mm)
4. Measure piston pin O.D. in two directions (90° apart)
at three locations on the length. Replace piston and
piston pin if out of specification.
MEASUREMENT
Piston Pin O.D.:
.8659 - .8661" (21.995 - 22.000 mm)
Service Limit: .8651" (21.975 mm)
ENGINE / COOLING SYSTEM
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