5.22
Engine Systems
9923396 - 2007-2012 EDGE/Widetrak LX Service Manual
©2011 Polaris Sales Inc.
Piston and Crankshaft Assembly
Disassembly / Assembly Process
1. Using a small, flat-blade screwdriver, remove the c-
clips. Discard the c-clips.
2. Remove the piston pins using the piston pin puller, PN
2870386.
3. When replacing a piston, always replace the rings, c-
clips, pins and needle bearings with new parts.
4. Inspect the crankshaft as outlined in the Engine
Inspection section within this chapter.
5. Install the piston rings with the beveled edge facing
upwards.
6. The piston ring locator pins and ring open-ends
always face the intake-side of the engine.
7. Always lubricate the piston assembly and cylinder
with two-stroke engine oil when installing the cylinder
over the piston.
PISTON RINGS
PISTON
C CLIP
PISTON PIN
NEEDLE BEARING
NEEDLE BEARING
ROD PIN
CONNECTING ROD
BEARING
THRUST WASHER
RETAINING RING
BEARING
BEARING
WASHER
FLYWHEEL NUT
FLYWHEEL KEY
PTO CRANKWEB
MAG CRANKWEB
CTR CRANKWEB
Wear eye protection when removing or installing piston
c-clips.
Fastener Torque Note
Flywheel Nut
62 - 70 ft.lbs.
(83 - 95 Nm)
Flywheel and
crankshaft tapers
to be clean and
dry.
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