Sym MAXSYM 400i - Page 111

6. Cylinder Head / Valve
6-2
Precautions in Operation
 This chapter is contained maintenance and service for cylinder head, valve, and camshaft as well as
rocker arm.
 Remove the engine from the frame before repairing the cylinder head.
Specification
LX40A
Item
Standard
Limit
Compression pressure
12+/2 kg/cm2
---
Camshaft
Height of cam lobe
Intake
35.640~35.730
35.600
Exhaust
35.290~35.370
35.250
Rocker
arm
ID of valve rocker arm
12.000~12.018
12.100
OD of valve rocker arm shaft
11.966~11.984
11.910
Valve
OD of valve stem
Intake
4.975~4.990
4.900
Exhaust
4.955~4.970
4.900
Guide seat
5.000~5.012
5.030
Clearance between
valve stem and guide
Intake
0.010~0.037
0.080
Exhaust
0.030~0.057
0.100
Free length of valve
spring
Inner
33.700
Outer
38.800
Valve seat width
1.000
1.6
Tilt angle of cylinder head
---
0.05
LX60A
Item
Standard
Limit
Compression pressure
12+/2 kg/cm2
---
Camshaft
Height of cam lobe
Intake
36.810~36.890
36.770
Exhaust
36.440~36.520
36.400
Rocker
arm
ID of valve rocker arm
13.000~13.018
13.098
OD of valve rocker arm shaft
12.991~13.009
12.936
Valve
OD of valve stem
Intake
4.975~4.990
4.900
Exhaust
4.955~4.970
4.900
Guide seat
5.000~5.012
5.030
Clearance between
valve stem and guide
Intake
0.010~0.037
0.080
Exhaust
0.030~0.057
0.100
Free length of valve
spring
Inner
33.700
Outer
38.800
Valve seat width
1.000
1.6
Tilt angle of cylinder head
---
0.05
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