Polaris 340 LX 2007 Service Manual page 106

Checking Crankshaft Index
1. Remove the drive belt and drive clutch.
2. Securely fasten a large degree wheel on the flywheel
or PTO end of the crankshaft. Make sure that it is
mounted concentrically with the crankshaft center
line.
3. With a section of wire (wire coat hanger), anchor it to
a convenient spot. Bend one end at the outer
perimeter of the degree wheel as shown below.
4. Install a dial indicator into the magneto end cylinder
spark plug hole. The ignition timing is referenced by
the magneto end.
5. Locate TDC as accurately as possible by finding the
center of the point where there is no piston movement
note the "Zero" the dial indicator at this point.
6. Continue to rotate the crankshaft in the normal
direction of rotation until the dial indicator reads .100"
(2.54mm) after top dead center (ATDC).
7. Bend the pointer or move the degree wheel until the
8. With the pointer aligned, make sure the degree wheel
NOTE: Do not move the crankshaft, degree wheel or
pointer after the initial setting on the MAG end
cylinder - simply read the wheel and dial indicator.
9. Remove the dial indicator and install in PTO cylinder.
9923396 - 2007-2012 EDGE/Widetrak LX Service Manual
©2011 Polaris Sales Inc.
Engine Systems
pointer aligns with a 180° mark on the degree wheel.
and pointer are secured and will not move out of
position. Re-check accuracy of this location a few
times. The pointer should align with the 180° mark
when the dial indicator reads .100" (2.54mm) ATDC.
Repeat finding TDC process. Note the degree wheel
indication when the dial indicator reads .100" ATDC.
It should be 180° (+/-2°) from the MAG cylinder mark.
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