Precautions In Operation - Sym Joyride125 Service Manual

6. CYLINDER HEAD/VALVE

PRECAUTIONS IN OPERATION

General Information
This chapter is contained maintenance and service for cylinder head, valve, and camshaft as well
as rocker arm.
Cylinder head service can be carried out when engine is in frame.
Specification
Compression pressure
Camshaft Height of cam lobe
Rocker ID of valve rocker arm
arm
OD of valve rocker arm shaft
Valve OD of valve stem
Guide seat
Clearance between
valve stem and guide
Free length of valve spring
Valve seat width
Tilt angle of cylinder head
Torque Value
Cylinder head bolt (LH)
Cylinder head Nut
Sealing bolt of cam chain auto-tensioner
Bolt of cam chain auto-tensioner
Cam sprocket cover bolts
Cam sprocket bolt
6-2
Item
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
To this chapter contents
Standard
12+/2 kg/cm2
30.800~30.920
30.411~30.531
12.000~12.018
11.966~11.984
4.975~4.990
4.955~4.970
5.000~5.012
0.010~0.037
0.030~0.057
35.000
1.000
---
2.0~2.4 kg-m
2.0~2.4 kg-m
0.8~1.2 kg-m
1.2~1.6 kg-m
0.8~1.2 kg-m
1.0~1.2 kg-m
Limit
---
3.075
30.26
12.10
11.910
4.900
4.900
5.030
0.080
0.100
31.500
1.6
0.05