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6-2 Precautions In Operation<br />
General Information<br />
• This chapter is contained maintenance and service for cylinder head, valve, and camshaft as well as<br />
rocker arm.<br />
• Cylinder head service can be carried out when engine is in frame.<br />
Specification of CYLINDER HEAD<br />
Item Standard Limit<br />
Compression pressure 12±2 kg/cm2 ---<br />
Camshaft<br />
Rocker arm<br />
Valve<br />
Height of cam lobe<br />
Intake 5.90 5.85<br />
Exhaust 5.70 5.65<br />
ID of valve rocker arm 11.982~12.000 12.080<br />
OD of valve rocker arm shaft 11.966~11.984 11.936<br />
OD of valve stem<br />
Intake 4.975~4.990 4.900<br />
Exhaust 4.950~4.975 4.900<br />
ID of valve guide 5.000~5.012 5.030<br />
Clearance between Intake 0.010~0.037 0.080<br />
valve stem and guide Exhaust 0.025~0.062 0.100<br />
Free length of valve Intake 38.700 35.200<br />
spring Exhaust 40.400 36.900<br />
Valve seat width 3.400 4.000<br />
Valve clearance<br />
Intake 0.10±0.02mm -<br />
Exhaust 0.15±0.02mm -<br />
Tilt angle of cylinder head --- 0.050<br />
Torque Value<br />
Cylinder head cover bolt<br />
Exhaust pipe stud bolt<br />
Cylinder head bolt<br />
Cylinder head Nut<br />
Sealing bolt of cam chain auto-tensioner<br />
Bolt of cam chain auto-tensioner<br />
Cylinder side cover bolt<br />
Cam sprocket bolt<br />
Tappet adjustment screw nut<br />
Spark plug<br />
1.0~1.4kgf-m<br />
2.4~3.0kgf-m<br />
1.0~1.4kgf-m<br />
3.6~4.0kgf-m<br />
0.8~1.2kgf-m<br />
1.2~1.6kgf-m<br />
1.0~1.4kgf-m<br />
1.0~1.4kgf-m<br />
0.7~1.1kgf-m<br />
1.0~1.2kgf-m<br />
Tools<br />
Special service tools<br />
Valve reamer: 5.0mm<br />
Valve guide driver: 5.0mm<br />
Valve spring compressor
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