Inspection And Repair; Cylinder Head - Yamaha Fazer Service Manual

INSPECTION AND REPAIR:

CYLINDER HEAD

INSPECTION AND REPAIR
CYLINDER HEAD
1. Remove :
NOTE :
Do not use a sharp instrument to avoid dam-
aging or scratching :
• Spark Plug threads
• Valve seats
2. Inspect :
3. Measure :
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Warpage measurement and resurfacement
steps:
• Place a straightedge ¿ and a feeler gauge À
across the Cylinder Head.
• Measure the warpage.
• If the warpage is out of specification, resur-
face the Cylinder Head/replace if necessary.
• Place a 400 ~ 600 grit wet abrasive paper on
the surface plate, and resurface the Head
using a figure-eight sanding pattern.
NOTE :
Rotate the Cylinder Head several times for an
even resurfacement.
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4-15
ENG
• Carbon deposits from combustion
chambers using a rounded scraper.
• Cylinder Head
Scratches/damage Ÿ Replace
• Cylinder Head warpage
Out of specification Ÿ resurface/ replace.
Cylinder Head warpage :
Less than 0.03 mm