Yamaha XT660R S Service Manual page 255

d
c
b
a
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5 - 15
CYLINDER HEAD
d. Install the spring and timing chain tensioner
cap bolt.
Timing chain tensioner cap bolt
20 Nm (2.0 m · kg, 14 ft · lb)
L LLL L LLL L L LLL L
6. Turn:
• crankshaft
(several turns counterclockwise)
7. Check:
• "I" mark a
NOTE:
Check that the "I" mark on the A.C. magneto
rotor is aligned with the stationary pointer b
on the A.C. magneto cover.
• "I" mark c
NOTE:
Check that the "I" mark on the camshaft
sprocket is aligned with the stationary pointer
d on the cylinder head.
Out of alignment → Correct.
Repeat steps 4-7, if necessary.
8. Tighten:
• camshaft sprocket bolts
CAUTION:
_
Be sure to tighten the camshaft sprocket
bolts to the specified torque to avoid the
possibility of the bolts coming loose and
damaging the engine.
9. Measure:
• valve clearance
Out of specification → Adjust.
Refer to "ADJUSTING
CLEARANCE" in chapter 3.
ENG
L LLL L L LLL L L LLL L
20 Nm (2.0 m · kg, 14 ft · lb)
THE VALVE
LLL