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6-2 Precautions In Operation
General Information
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This chapter is contained maintenance and service for cylinder head, valve, and camshaft as well as
rocker arm.
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Cylinder head service can be carried out when engine is in frame.
Specification of CYLINDER HEAD
Item Standard
Limit
Compression pressure
12±2 kg/cm2
---
Intake 5.90
5.85
Camshaft
Height of cam lobe
Exhaust 5.70
5.65
ID of valve rocker arm
11.982~12.000
12.080
Rocker arm
OD of valve rocker arm shaft
11.966~11.984
11.936
Intake 4.975~4.990 4.900
OD of valve stem
Exhaust 4.950~4.975
4.900
ID of valve guide
5.000~5.012
5.030
Intake 0.010~0.037 0.080
Clearance between
valve stem and guide
Exhaust 0.025~0.062
0.100
Intake 38.700 35.200
Free length of valve
spring
Exhaust 40.400
36.900
Valve seat width
3.400
4.000
Intake 0.10±0.02mm
-
Valve
Valve clearance
Exhaust 0.15±0.02mm
-
Tilt angle of cylinder head
---
0.050
Torque Value
Cylinder head cover bolt
1.0~1.4kgf-m
Exhaust pipe stud bolt
2.4~3.0kgf-m
Cylinder head bolt
1.0~1.4kgf-m
Cylinder head Nut
3.6~4.0kgf-m
Sealing bolt of cam chain auto-tensioner
0.8~1.2kgf-m
Bolt of cam chain auto-tensioner 1.2~1.6kgf-m
Cylinder side cover bolt
1.0~1.4kgf-m
Cam sprocket bolt
1.0~1.4kgf-m
Tappet adjustment screw nut
0.7~1.1kgf-m
Spark plug
1.0~1.2kgf-m
Tools
Special service tools
Valve reamer: 5.0mm
Valve guide driver: 5.0mm
Valve spring compressor
Summary of Contents for ET300 - SERVICE
Page 1: ...1 ET 300 Service Manual ...
Page 142: ...REAR BRAKE ...
Page 160: ......
Page 161: ...17 8 Wiring Diagram ...