Checking The Timing Chain Guide (Exhaust Side) - Yamaha FZ09E Service Manual

REMOVING THE CYLINDER HEAD
1.
Remove:
• Intake camshaft
• Exhaust camshaft
Refer to "REMOVING THE CAMSHAFTS"
on page 5-11.
2. 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.
EA$1AC1508
CHECKING THE TIMING CHAIN GUIDE
(EXHAUST SIDE)
1. Check:
•Timing chain guide (exhaust side)
Damage/wear4 Replace.
EA~ 1 $)
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.
CYLINDER HEAD
• Cylinder head water jacket
Mineral
deposits/rust ~
Eliminate.
3. Measure:
• Cylinder head warpage
Out of specification 4 Resurface the cylinder
head.
Warpage limit
0.10 mm (0.0039 in)
• •••••••••••••••••••••••••••••••
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 4~0 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.
5-20