S5 Workshop Manual
Engine
EM-65
Valve
Valve length
Air intake
Air exhaust
Outer diameter of valve rod
Air intake
Air exhaust
Taper angle
Width (edge) of valve head
Air intake
Air exhaust
Clearance between valve rod
and guide pipe
Air intake
Air exhaust
109.5 mm
109.7 mm
6.565
～
6.580 mm
6.530
～
6.550 mm
45º ± 10
’
1.0 mm
1.5 mm
0.020
～
0.050 mm
0.050
～
0.085 mm
0.7 mm
1.0 mm
0.1
mm
0.15 mm
Valve guide pipe
Length
Air intake
Air exhaust
Maintenance over dimension
45.5 ± 0.1 mm
50.5 ± 0.1 mm
0.05, 0.25, 0.50 mm
Valve seat
Seat contacting width
Seat tapering angle
Maintenance dimension
0.9
～
1.3 mm
44º
～
44º5’
0.2 mm
0.6 mm more than tolerance
Valve spring
Free length
Bearing capacity
Tilting
46 mm
25.3 kg / 40 mm
When assembling height
Less than 1.5º
44.82 mm
4º
Cylinder body
Cylinder bore
Bore out of roundness and
taper
Cylinder gasket surface
flatness
04
.
0
0
85
φ
mm
Less than 0.01 mm
Less than 0.05 mm
0.1 mm
Piston
Outer diameter
Clearance between piston and
cylinder
Ring slot width
No.1
No.2
Oil ring
84.97
～
85 mm
0.02
～
0.04 mm
1.21
～
1.23 mm
1.51
～
1.53 mm
2.81
～
2.83 mm
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