KEEWAY ATV300, User Manual, Page: 36 / 110

36
Remove valve stem seals
Clean carbon deposits in combustion chamber.
Clean residues and foreign materials on
cylinder head matching surface.
Caution
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.
Do not damage the matching surface of
cylinder head.