Service Information - KYMCO Downtown 200i Service Manual

6. CYLINDER HEAD/VALVES

SERVICE INFORMATION

GENERAL INSTRUCTIONS
• The cylinder head can be serviced with the engine installed in the frame. Coolant in the radiator and
water hoses must be drained.
• 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 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.
SPECIFICATIONS
Item
Valve clearance (cold)
Cylinder head compression pressure
Camshaft cam height
Valve rocker arm I.D.
Valve rocker arm shaft
O.D.
Valve seat width
Valve stem O.D.
Valve guide I.D.
Valve stem-to-guide
clearance
TORQUE VALUES
SPECIAL TOOL
Valve spring compressor
Standard (mm)
IN
EX
IN
EX
IN 12.00～12.018
EX 12.00～12.018
IN 11.966～11.984
EX 11.966～11.984
IN
EX
IN 4.990～4.975
EX 4.970～4.955
IN 5.00～5.012
EX 5.00～5.012
IN 0.010～0.037
EX 0.030～0.057
E063
0.10
0.10
16 kg/cm²
35.8281
35.8437
1.2
1.2
DOWNTOWN 200i
6-2