Cylinder Head/Valves Torque Values (Dink 125); Cylinder Head/Valves - Special Tools; Cylinder Head/Valves Troubleshooting - KYMCO DINK 125 Service Manual

6
. CYLINDER HEAD/VALVES
TORQUE VALUES
(DINK 125)
Cylinder head cover bolt
Tensioner mounting bolt
Tensioner sealing bolt
Cylinder head cap nut
Cylinder head bolt
SPECIAL TOOLS
Valve spring compressor
TROUBLESHOOTING
• The poor cylinder head operation can be diagnosed by a compression test or by tracing engine
top-end noises.
Poor performance at idle speed
• Compression too low
Compression too low
• Incorrect valve clearance adjustment
• Burned or bend valves
• Incorrect valve timing
• Broken valve spring
• Poor valve and seat contact
• Leaking cylinder head gasket
• Warped or cracked cylinder head
• Poorly installed spark plug
Compression too high
• Excessive carbon build-up in combustion
chamber
6-5
1.2 kgf-m (12 N-m, 8.6 lbf-ft)
0.9 kgf-m (9 N-m, 6.5 lbf-ft)
0.9 kgf-m (9 N-m, 6.5 lbf-ft)
2.2 kgf-m (22 N-m, 15.8 lbf-ft) Apply engine oil to threads
1 kgf-m (10 N-m, 7.2 lbf-ft)
A120E00040
White smoke from exhaust muffler
• Worn valve stem or valve guide
• Damaged valve stem oil seal
Abnormal noise
• Incorrect valve clearance adjustment
• Sticking valve or broken valve spring
• Damaged or worn camshaft
• Worn cam chain tensioner
• Worn camshaft and rocker arm
DINK 50/ 125