Inspection And Repair - Yamaha XT 600 AC Service Manual

INSPECTION AND REPAIR
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I
ENG
1'-1
. .
4-21
INSPECTION AND REPAIR
CYLINDER HEAD
1. Eliminate:
- Carbon deposit
(from combustion chamber)
Use rounded scraper
CD .
NOTE: ______________________ ___
Do not use a sharp instrument and avoid damag-
ing or scratching:
- Spark plug threads
-Valve seat
2. Inspect:
-Cylinder head
Scratches/ Damage---+ Replace.
3. Measure:
-Warpage
Out of specification---+ Resurface.
Cylinder head warpage:
Less than 0.03 mm (0.0012 in)
4. Resurface:
- Cylinder head
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Resurfacement steps:
Place a 400'"'-'600 grit wet sandpaper on the
surface plate, and resurface the head using a
figure-eight sanding pattern.
NOTE: ________________________ _
Rotate the head several times to avoid remov-
ing too much material from one side.
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