Polaris 340 LX 2007 User Manual

5.39
Engine Systems
5
9923396 - 2007-2012 EDGE/Widetrak LX Service Manual
©2011 Polaris Sales Inc.
500EV Pistons / Crankshaft
Disassembly / Assembly Process
1. To remove the pistons, follow the process for
removing the cylinder head and cylinders from the
engine.
2. To remove the crankshaft, follow the process for
disassembling the crankcase assembly.
3. With the piston out of the cylinder, remove one of the
c-clips and discard. Never re-use piston c-clips.
4. Push the piston pin out of the piston and upper rod
bearings. Inspect the pin for galling and abnormal
wear. Inspect the needle bearing by feel and replace
as required.
5. New pistons are supplied with new rings and a piston
pin. It is recommended that new needle bearings be
installed as well.
6. When installing a new piston, insert one c-clip into the
piston making sure the open end is 180° opposite of
the groove opening.
7. Apply a liberal amount of Polaris two-stroke engine oil
to the needle bearings, piston pin and piston
assembly.
8. Push the pin in to the piston, then through the needle
bearing. Install the remaining c-clip with the open end
is 180° opposite of the groove opening.
NOTE: Always use new cylinder base gaskets.
9. Apply a liberal amount of Polaris two-stroke oil to the
cylinder wall. Align the piston ring gaps around the
piston locating pins. Compress the upper ring, then
carefully slide the cylinder down over the ring.
10. Compress the lower ring, then slide the cylinder down
over the ring.
PISTON
PISTON PIN
PISTON RINGS
C-CLIP
NEEDLE BEARINGS
PTO CRANKCASE SEAL
BEARINGS
BEARING
FLYWHEEL KEY
MAG CRANKCASE SEAL
Piston Matrix
Engine Model Piston PN Piston ID
S3033-5044-PF5F 2202318 EK-2252d

Polaris 340 LX 2007 Specifications

General

Brand	Polaris
Model	340 LX 2007
Category	Offroad Vehicle
Language	English