Yamaha TT600RE (2004) [225/382] Inspection and repair

ENG

INSPECTION AND REPAIR

5-21

INSPECTION AND REPAIR

CYLINDER HEAD

1. Eliminate:

•

Carbon deposits

(from combustion chamber)

Use a rounded scraper (1).

NOTE:

Do not use a pointed tool to avoid damaging or

scratching:

•

spark plug thread

•

valve seats

•

combustion chamber

2. Inspect:

•

Cylinder head

Scratches/Damage ➔ Replace.

3. Measure:

•

Deformation

Out of specification ➔ Rework the surface.

Cylinder head deformation:

Less than 0.03 mm

4. Surface:

•

Cylinder head

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Levelling:

Level the cylinder head with wet 400 ~ 600 emery

paper in a figure-8 direction.

NOTE:

To avoid removing too much material on one side

only, turn the cylinder head a number of times.