Yamaha YZ426F(M)/LC, Руководство по эксплуатации для владельца

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ENG
CYLINDER HEAD
INSPECTION
Cylinder head
1. Eliminate:
●
Carbon deposits (from the combustion
chambers)
Use a rounded scraper.
NOTE:
Do not use a sharp instrument to avoid dam-
aging or scratching:
●
Spark plug threads
●
Valve seats
2. Inspect:
●
Cylinder head
Scratches/damage
→
Replace.
3. Measure:
●
Cylinder head warpage
Out of specification
→
Resurface.
ASSEMBLY AND INSTALLATION
1. Install:
●
Cylinder head
●
Bolts (1 ~ 4)
●
Bolt (5)
●
Nuts (6, 7)
●
Nuts (8, 9)
NOTE:
Follow the numerical order shown in the illus-
tration. Tighten the bolts and nuts in two
stages.
Cylinder head warpage:
Less than 0.03 mm (0.002 in)
Warpage measurement and resurface-
ment steps:
●
Place a straightedge and a feeler gauge
across the cylinder head.
●
Use a feeler gauge to measure the
warpage.
●
If the warpage is out of specification,
resurface the cylinder head.
●
Place a 400 ~ 600 grit wet sandpaper on
the surface plate, and resurface the head
using a figure-eight sanding pattern.
NOTE:
To ensure an even surface rotate the cylin-
der head several times.
T
R
.
.
44 Nm (4.4 m · kg, 32 ft · lb)
T
R .
.
10 Nm (1.0 m · kg, 7.2 ft · lb)
T
R
.
.
20 Nm (2.0 m · kg, 14 ft · lb)
T
R .
.
10 Nm (1.0 m · kg, 7.2 ft · lb)