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.
TORQUE VALUES
Cylinder head cap nut 19.6N-m Apply engine oil to threads
Valve clearance adjusting nut 8.8N-m Apply engine oil to threads
Cylinder head cover bolt 7.8_ 11.8N-m
SPECIAL TOOLS
Valve spring compressor
Valve seat cutter, 24.5mm 45° IN-EX
Valve seat cutter, 25mm Plane cutter 37.5° EX
Valve seat cutter, 22mm Plane cutter 37.5° EX
Valve seat cutter, 26mm Plane cutter 63.5° IN/EX
Cutter clip
Valve guide driver
Valve guide reamer
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