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6. CYLINDER HEAD/VALVES K-PIPE 50
SERVICE INFORMATION
GENERAL INSTRUCTIONS
The cylinder head can be serviced with the engine installed in the frame. Coolant in the radiator
and water jacket must be drained first.
When assembling, apply molybdenum disulfide grease or engine oil to the valve guide movable
parts and valve arm sliding surfaces for initial lubrication.
The valve rocker arms are lubricated by engine oil through the cylinder head engine oil passages.
Clean and unclog the oil passages before assembling the cylinder head.
After disassembly, clean the removed parts and dry them with compressed air before inspection.
After removal, mark and arrange the removed parts in order. When assembling, install them in
the reverse order of removal.
Item Standard (mm)
Valve clearance (cold) IN 0.06
EX 0.06
Cylinder head compression pressure 15kg/cm
Cylinder head warpage
Camshaft cam height IN
EX
Valve rocker arm I.D. IN
EX
Valve rocker arm shaft IN
O.D. EX
Valve stem O.D. IN 4.924.970
EX 4.904.950
Valve guide I.D. IN
EX
Valve stem-to-guide IN
clearance EX
TORQUE VALUES
Cylinder head cap nut 1.02.0kg-m
Valve clearance adjusting nut 0.9kg-m
Cylinder head cover nut 1.21.6kg-m
SPECIAL TOOLS
Valve spring compressor
6-2