Yamaha XSR MTM690 2016 Service Manual page 260

Rotor holding tool
90890-01235
Universal magneto and rotor
holder
YU-01235
a
2
1
3. Install:
• Decompressor lever pins "1"
• Decompressor lever #1 "2"
• Decompressor lever #2 "3"
TIP
• Face the cutout "a" in each decompressor le-
ver pin toward the exhaust camshaft sprocket.
• Install the decompressor lever pins, decom-
pressor lever #1, and decompressor lever #2
into the exhaust camshaft as shown in the illus-
tration.
1
a
4. Install:
• Exhaust camshaft sprocket "1"
Exhaust camshaft sprocket bolt
24 Nm (2.4 m·kgf, 17 ft·lbf)
1
b
1
2
2 1 3
a
1 1
ECA19980
NOTICE
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.
TIP
• Make sure that the mark "a" on the exhaust
camshaft sprocket is aligned with cam lobe #1
"b" as shown in the illustration.
• While holding the exhaust camshaft with a suit-
able tool, tighten the exhaust camshaft sprock-
et bolts.
• Tighten the camshaft sprocket bolts in the
tightening sequence as shown.
b
1
2
5. Install:
• Timing chain "1"
(onto the exhaust camshaft sprocket "2")
• Exhaust camshaft
• Exhaust camshaft cap
ECA20930
NOTICE
• Lubricate the camshaft cap bolts with the
engine oil.
• The camshaft cap bolts must be tightened
evenly or damage to the cylinder head,
camshaft caps, and camshafts will result.
• Do not turn the crankshaft when installing
the camshaft to avoid damage or improper
valve timing.
5-19
CAMSHAFTS
a
1
1
a
1