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Remove valve stem seals.
Clean carbon deposits in combustion chamber.
Clean residues and foreign materials on cylinder
head matching surface.
Caution
Do not damage the matching surface of cylinder
head.
6-5 Cylinder Head Inspection
Check if spark plug and valve holes are cracked.
Measure cylinder head warp with a straightedge and
thickness gauge.
Service limit: 0.5 mm
Camshaft
Inspect cam lobe height for damaged.
Service Limit:
IN: Replacement when less than 34.45mm
EX: Replacement when less than 34.30mm
Inspect the camshaft bearing for looseness or wear
out. If any damage, replace whole set of camshaft
and bearing.
Valve stem seals
Summary of Contents for ET-250
Page 1: ...1 ET 250...
Page 51: ...Use 32 cutter to cut a quarter upper parts out...
Page 54: ......
Page 60: ...7 1 Mechanism Diagram 0 8 1 2kgf m 1 0 1 4kgf m...
Page 67: ...7 7 Cylinder Installation Install dowel pins and new gasket Dowel pins...
Page 96: ...10 1 Mechanism Diagram 5 0 6 0kgf m 1 0 1 4kgf m 0 8 1 2kgf m...
Page 140: ...REAR BRAKE...
Page 158: ......
Page 159: ...17 8 WIRING DIAGRAM...