Removing The Cylinder Head; Checking The Timing Chain Guide (Exhaust Side); Checking The Cylinder Head; Installing The Cylinder Head - Yamaha XT1200Z 2010 Service Manual

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EAS24120

REMOVING THE CYLINDER HEAD

1. Remove:
• Cylinder head bolts
TIP
• Loosen the bolts in the proper sequence as
shown.
• Loosen each bolt 1/2 of a turn at a time. After
all of the bolts are fully loosened, remove them.
• M6 × 125 mm: "1", "2"
• M12 × 185 mm: "3"–"8"
×2 ×6
6
4
EAS23P1107
CHECKING THE TIMING CHAIN GUIDE
(EXHAUST SIDE)
1. Check:
• Timing chain guide (exhaust side)
Damage/wear→Replace.
EAS24170

CHECKING THE CYLINDER HEAD

1. Eliminate:
• Combustion chamber carbon deposits
(with a rounded scraper)
TIP
Do not use a sharp instrument to avoid damag-
ing or scratching:
• Spark plug bore threads
• Valve seats
2. Check:
• Cylinder head
Damage/scratches → Replace.
email: info@motomatrix.co.uk
FWD
8
3
5
7
• Cylinder head water jacket
Mineral deposits/rust → Eliminate.
3. Measure:
• Cylinder head warpage
Out of specification → Resurface the cylinder
head.
Warpage limit
0.03 mm (0.0012 in)
M MMM M MMM M
a. Place a straightedge "1" and a thickness
gauge "2" across the cylinder head.
1
2
b. Measure the warpage.
c. If the limit is exceeded, resurface the cylinder
head as follows.
d. Place a 400–600 grit wet sandpaper on the
surface plate and resurface the cylinder head
using a figure-eight sanding pattern.
TIP
To ensure an even surface, rotate the cylinder
head several times.
L LLL L LLL L
EAS24240

INSTALLING THE CYLINDER HEAD

1. Install:
• Cylinder head
TIP
Pass the timing chain through the timing chain
cavity.
5-27
CYLINDER HEAD
M MMM M M MMM M M MMM M M MMM
1
2
L LLL L L LLL L L LLL L L LLL
M MMM
L LLL