Installing The Cylinder Head - Yamaha R1 Series 2015 Service Manual

EAS30276
REMOVING THE CYLINDER HEAD
1. Remove:
• Intake camshaft
• Exhaust camshaft
Refer to "REMOVING THE CAMSHAFTS"
on page 5-13.
2. Remove:
• Cylinder head bolt (M6) ( 2)
• Cylinder head bolt (M9) ( 10)
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.
7 11
5
4
10 12
EAS30277
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
• Cylinder head water jacket
Mineral deposits/rust
3. Measure:
• Cylinder head warpage
Out of specification
head.
Warpage limit
0.10 mm (0.0039 in)
9
3
1
2
6
8
2
10
Replace.
Eliminate.
Resurface the cylinder
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a. Place a straightedge "1" and a thickness
gauge "2" across the cylinder head.
Thickness gauge
90890-03180
Feeler gauge set
YU-26900-9
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.
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EAS30282

INSTALLING THE CYLINDER HEAD

1. Install:
• Cylinder head gasket "1"
• Dowel pins
5-24
CYLINDER HEAD
New