Yamaha XT660R Service Manual page 253

e
d
New
CYLINDER HEAD
c. Install the timing chain 1 onto the camshaft
NOTE:
To install the camshaft sprocket sprocket,
install the projection 3 on the camshaft
sprocket into the slot a in the decompression
lever.
d. Make sure the "I" mark d on the camshaft
NOTE:
_
• When installing the camshaft sprocket, be
• Align the projection on the camshaft with the
_
Do not turn the crankshaft when installing
the camshaft to avoid damage or improper
valve timing.
e. Remove the wire from the timing chain.
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5. Install:
• timing chain tensioner
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a. Remove the timing chain tensioner cap bolt
New
b. Release the timing chain tensioner one-way
c. Install the timing chain tensioner and gasket
NOTE:
Install the gasket with its beaded side facing
the timing chain tensioner end.
5 - 14
sprocket 2, then the camshaft sprocket
onto the camshaft, and then finger tighten
the camshaft sprocket bolts.
sprocket with the stationary pointer e on
the cylinder head.
sure to keep the timing chain as tight as pos-
sible at the exhaust end of the chain.
slot in the camshaft sprocket.
CAUTION:
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1, copper washer 2 and spring 3.
cam 4 and push the timing chain tensioner
rod 5 all the way into the timing chain ten-
sioner housing.
6 onto the cylinder.
Timing chain tensioner bolt
10 Nm (1.0 m · kg, 7.2 ft · lb)
ENG
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