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9930588 R02 - 2017-2020 RZR 900 900/S 900/S4 1000/S 1000/S4 Service Manual
© Copyright Polaris Industries Inc.
3.81
8. Verify TDC mark on the flywheel is still properly
aligned (see Step 1).
9. Pull cam chain upward, making sure it is engaged
with the drive sprocket on the crankshaft.
10. While lifting the cam chain up, engage the cam
sprockets into the chain with the “I” and “E” marks
facing out.
11. Install the sprockets onto the camshafts and align
the sprocket marks with the valve cover gasket
surface (see sprocket timing illustration).
NOTICE
Intake cam sprocket should have “I” marks aligned with
gasket surface and the exhaust cam sprocket should
have “E” marks aligned with gasket surface.
Install the exhaust cam sprocket first (opposite the cam
chain tensioner) to ensure proper cam timing.
12. Use new camshaft sprocket retaining bolts upon
assembly. Install the top bolt
i
in each camshaft
sprocket
u
. Do not torque the bolts at this time.
NOTICE
Use new sprocket retaining bolts upon assembly.
13. Verify cam timing is correct. Flywheel TDC mark
should still be aligned (see Step 1) and cam sprocket
markings should line up as shown.
Timing View for Sprockets
For correct sprocket orientation, ensure the “I” for
intake on cam 1204052 and the “E” for exhaust on
cam 1204053 are positioned as shown
o
. View
from mag side.
Timing View for Camshafts
Align slot of both cams with the top deck of the
head
a
. Position 4mm thick flat bar through slots
to lock cams in correct position.
14. If timing marks are not aligned, remove sprockets
and correct alignment.
15. Remove the Cylinder Holding & Camshaft Timing
Plate (PU-50563) from the end of the camshafts.
16. Apply Polaris PS-4 engine oil to the cam chain
tensioner bore prior to assembly.
ENGINE / COOLING SYSTEM
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