7. CYLINDER HEAD/VALVES
7-1
AGILITY CITY 125
SERVICE INFORMATION
GENERAL INSTRUCTIONS
xThe cylinder head can be serviced with the engine installed in the frame.
xWhen assembling, apply molybdenum disulfide grease or engine oil to the valve guide movable
parts, valve arm and camshaft sliding surfaces for initial lubrication.
xThe camshaft is lubricated by engine oil through the cylinder head engine oil passages. Clean and
unclog the oil passages before assembling the cylinder head.
xAfter disassembly, clean the removed parts and dry them with compressed air before inspection.
xAfter removal, mark and arrange the removed parts in order. When assembling, install them in
the reverse order of removal.
SPECIFICATIONS
Item Standard (mm) Service Limit (mm)
IN 0.12
EX 0.12
Cylinder head compression pressure 13kg/cm²
Cylinder head warpage
IN 29.803 29.40
EX 29.5637 29.16
IN 10.000Д10.015 10.10
EX 10.000Д10.015 10.10
Valve rocker arm shaft IN 9.972Д9.987 9.91
O.D.
EX 9.972Д9.987 9.91
IN 1.0 1.8
EX 1.0 1.8
IN 4.975Д4.990 4.90
EX 4.955Д4.970 4.90
IN 5.000Д5.012 5.03
EX 5.000Д5.012 5.03
Valve stem-to-guide IN 0.010Д0.037 0.08
clearance
EX 0.030Д0.057 0.10
SERVICE INFORMATION......................7-1 CYLINDER HEAD DISASSEMBLY.......7-7
TROUBLESHOOTING ............................7-2 CYLINDER HEAD ASSEMBLY.............7-8
CAMSHAFT REMOVAL.........................7-3 CYLINDER HEAD INSTALLATION .....7-8
CYLINDER HEAD REMOVAL..............7-5 CAMSHAFT INSTALLATION................7-9
Valve clearance (cold)
Valve rocker arm I.D.
Valve stem O.D.
Valve guide I.D.
Camshaft cam height
Valve seat width
Cortesia de / Courtesy of: www.batmotos.com
Recambios KYMCO en www.batmotos.com
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