Yamaha VMX12H Supplementary Service Manual page 199

ENG I NE ASSEMBLY AND ADJUSTMENT
3-75
Force the intake camshaft counterclockwise
to remove the cam chain slack.
the cam chain onto the exhaust
sprocket.
Install the sprocket with the punched mark
" REAR" facing outward and finger-tighten
the sprocket bolt.
NOTE:
Align the "EX" mark hole on the sprocket
with the thread hole on the camshaft.
the exhaust camshaft to align the
timing mark small hole) on the cam-
shaft with the embossed match mark on
(E-4).
the camshaft cap
Force the exhaust camshaft clockwise
remove all the cam chain slack.
your finger into the cam chain
tensioner hole, and push the cam chain
guide inward.
pushing the cam chain guide, be sure
camshaft embossed match marks align with
the timing marks on the camshaft.
marks do not align, change the meshing
position of sprocket and cam chain.
6. Install:
Cam chain tensioner
By the following installation steps.
Cam chain tensioner installation steps:
the tensioner end cap bolt and
spring.
Release the cam chain tensioner one-way
cam
Install the tensioner with a new gasket into
the cylinder.
Cam Chain Tensioner Body:
12 Nm (1.2
.Install the tensioner spring
washer and end cap bolt
End Bolt (Cam Chain Tensioner):
20 Nm (2.0
to
8.7
, copper
.
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