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9. CYLINDER HEAD/VALVES MYROAD 700i
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.
· 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.
SPECIFICATIONS Unit: mm
Item Standard Service Limit
Cylinder head compression pressure 13 kg/cm2
IN 0.160.03
Valve clearance (cold)
EX 0.220.03
Valve Stem O.D. IN 4.475~4.490 4.465
EX 4.455~4.470 4.445
IN 5.000~5.012 4.532
Valve Guide I.D.
EX 5.000~5.012 4.532
Valve stem-to-guide IN 0.010~0.037 0.08
clearance EX 0.030~0.057 0.1
Valve lifter O.D. 27.965~27.98 27.91
Camshaft cam height IN 36.6 36.5
EX 36.6 36.5
TORQUE VALUES
Cylinder head cover bolt 0.8~1.2 kgf·m Apply engine oil to threads
Breather separator bolt 0.8~1.2 kgf·m Apply engine oil to threads
Cam chain holder bolt 0.8~1.2 kgf·m
Cylinder bolt 0.8~1.2 kgf·m
Cam chain tensioner bolt 0.8~1.2 kgf·m
Cylinder head bolt 4.8~5.2 kgf·m Apply engine oil to threads
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