Yamaha XT1200Z(Z) 2010, Service Manual

Page: 312 / 616

CAMSHAFTS
5-17
NOTICE
ECA13720
To prevent damage to the cylinder head,
camshafts or camshaft caps, loosen the
camshaft cap bolts in stages and in a criss-
cross pattern, working from the outside in.
4. Remove:
• Intake camshaft “1”
• Exhaust camshaft “2”
TIP
To prevent the timing chain from falling into the
crankcase, fasten it with a wire “3”.
5. Remove:
• Intake camshaft sprocket “1”
• Exhaust camshaft sprocket “2”
TIP
While holding the intake camshaft sprocket and
exhaust camshaft sprocket with the rotor holding
tool “3”, loosen the intake camshaft sprocket
bolts and exhaust camshaft sprocket bolts.
EAS23850
CHECKING THE CAMSHAFTS
1. Check:
• Camshaft lobes
Blue discoloration/pitting/scratches
→
Re-
place the camshaft.
2. Measure:
• Camshaft lobe dimensions “a” and “b”
Out of specification
→
Replace the camshaft.
Rotor holding tool
90890-01235
Universal magneto & rotor holder
YU-01235
1
2
3
3
1
Camshaft lobe dimensions
Intake A
40.250–40.350 mm (1.5846–
1.5886 in)
Limit
40.150 mm (1.5807 in)
Intake B
29.976–30.076 mm (1.1802–
1.1841 in)
Limit
29.876 mm (1.1762 in)
Exhaust A
39.250–39.350 mm (1.5453–
1.5492 in)
Limit
39.150 mm (1.5413 in)
Exhaust B
29.950–30.050 mm (1.1791–
1.1831 in)
Limit
29.850 mm (1.1752 in)
2
3