DAELIM BESBI SC125 - Service Manual - 9. Cylinder Head / Valves

9-1

9. CYLINDER HEAD / VALVES

SERVICE INFORMATION

GENERAL SAFETY

The rocker arm and the camshaft can be serviced without removing the engine. However, the engine must be removed

from the frame to maintain the cylinder head.

The oil of camshaft oil is supplied through the cylinder head oil hole. Clean the oil hole prior to assembling the cylinder

head.

SPECIFICATIONS

SERVICE INFORMATION

9-1

TROUBLESHOOTING

9-2

CAMSHAFT

9-3

CYLINDER HEAD

9-5

VALVE SPRINGS

9-6

VALVES

9-6

VALVE GUIDES

9-7

VALVE SEATS

9-8

CYLINDER HEAD ASSEMBLY

9-12

CAMSHAFT ASSEMBLY

9-13

TORQUE VALUES

CAM CHAIN TENSIONER PIVOT BOLT

1.0 kgf

m

SPARK PLUG

1.2 kgf

m

CAMSHAFT HOLDER 8mm NUT

2.9 kgf

m

CAM CHAIN TENSIONER MOUNTING BOLT

1.2 kgf

m

CAM CHAIN TENSIONER SEALING SCREW

0.4 kgf

m

CYLINDER HEAD COVER BOLT

0.9 kgf

m

CYLINDER HEAD BOLT

1.1 kgf

m

TAPPET ADJUST NUT

1.1 kgf

m

ITEM

STANDARD VALUE

SERVICE LIMIT

Unit : mm

ROCKER ARM

CAM HEIGHT

VALVE STEM OUTER DIAMETER

CLEARANCE BETWEEN 

STEM AND GUIDE

CAMSHAFT

VALVE

VALVE GUIDE

ROCKER ARM INNER DIAMETER 

10.000 - 10.015 

10.10

ROCKER ARM SHAFT OUTER DIAMETER 

9.972 - 9.987  

9.91

IN 

25.965                           25.57

EX 

25.810  

25.41

CAMSHAFT OUTER DIAMETER 

15.005 - 15.018                  15.040

0.05

VALVE SPRING FREE LENGTH 

IN,EX               31.2/34.1                      30.2/33.1

IN 

4.975 - 4.990  

4.900

EX 

4.955 - 4.970 

4.900

VALVE GUIDE INNER DIAMETER 

IN,EX

5.000 - 5.012 

5.030 

IN 

0.010 - 0.037 

0.080

EX 

0.030 - 0.057

0.100

VALVE SEAT WIDTH 

1.0

1.8

CYLINDER HEAD WARPAGE 

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