EMAK K 700 H Workshop Manual page 44

Valve seat width
Remove carbon deposits from the combustion chamber. Inspection
the valve seats for pitting or other damage. Measure the valve seat
width.
Standard
0,8 mm
If the valve seat width is under the standard, or over
the service limit, recondition the valve seat.
Cylinder head
1. Remove carbon deposits from the combustion chamber. Clean
off any gasket material from the cylinder head surface.
2. Check the spark plug hole and valve areas for cracks.
3. Check the cylinder head for warpage with a straight edge and a
feeler gauge as shown.
Service limit
Valve stem OD
Inspect each valve for face irregularities, bending or abnormal stem
wear. Replace the valve if necessary. Measure and record each
valve stem OD.
Standard
IN. 5.480 mm
EX 5.440 mm
Replace the valves if their OD is smaller than the service limit.
Valve guide ID
Ream the exhaust valve guide to remove any carbon deposits
before measuring. Measure and record each valve guide ID.
Standard
5,500
Service limit
2.0 mm
0,10 mm
Service limit
5.318 mm
5.275 mm
Service limit
5.572 mm
44
Workshop manual
Straight edge
Feeler gauge