Checking The Cylinder Heads; Installing The Cylinder Heads - Yamaha XVZ13TF 1999 Service Manual

CYLINDER HEADS
EAS00230

CHECKING THE CYLINDER HEADS

The following procedure applies to all of the cyl-
inder heads.
1. Eliminate:
S carbon deposits
(from the combustion chambers with a
rounded scraper)
NOTE:
Do not use a sharp instrument to avoid damag-
ing or scratching:
S spark plug threads
S valve seats
2. Check:
S cylinder head
Damage/scratches ! Replace.
S cylinder head water jacket 1
Mineral deposits/rust ! Eliminate.
S timing chain damper
Damage/wear ! Replace.
3. Measure:
S cylinder head warpage
Out of specification ! Resurface the cylin-
der head.
Cylinder head warpage
Less than 0.03 mm
a. Place a straightedge 1 and a thickness
gauge 2 across the cylinder head.
b. Measure the warpage.
c. If the limited is exceeded, resurface the cylin-
der head as follows.
d. Place a 400 X 600 grit wet sandpaper on the
surface plate and resurface the cylinder
head using a figure-eight sanding pattern.
NOTE:
To ensure an even surface, rotate the cylinder
head several times.
EAS00235

INSTALLING THE CYLINDER HEADS

Rear cylinder
1. Install:
S dowel pins 1
S gasket (New) 2
S timing chain guide (exhaust side) 3
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ENG