Camshaft; Inlet Valve, Values Are For C50, C50M, S50 - Table; Outer Valve Spring Table; Inner Valve Spring Table - Honda C50 Shop Manual

78
Di al ga uge
Valve spring (outer)
Load: 5.4±
0.3k~
-
( 11.88± .661bs)
27.<
E
IC7- -
- ---
- . --:-:-' .:=r-
_:__: :~
L~ 0 ~ 0 24.9
r:::9 ~ ~o ·-
_ _ _
3
Figure 3- 30. O u er ·o .e
s::- -;
- - ---- - -
Valve spring (inner)
l oad: 2.6 ± 0.15 15.72 ± 0.33
!bsl -
Figure 3- 31. Inne r valve spring
Figure 3-32. Camshaft'
3. ENGINE
131 Inlet valve, [
J
values are for C50, C50M, S50
Standard Value Serviceable Limit
64.5 12.540 in.l
Replace if under
Length
( 66 ]
12.600 in.)
64.1 1 2.580 in.l
( 65.6] 1 2.530 in.l
5.5 mm 10.217 in.l
Replace if under
Stem dia -0.035 1 0.001 4 in.)
-0 .045 1 0.001 8 in.)
5.44 10,21 4 in.)
Head
0.5 1 0.020 in .I
I
Replace if under
thickness
±0.1 10.004 in .) 0 .2
1 0.008 in .)
1 41 Va lve st em to guide · clearance, inlet
Standard va lue--->0.010-0.030 10.0004-0.0012 inl
Serviceable limit--->Replace if over 0.06 1 0.0023 i nl
1 51 Va lve stem to guide cl earance, exhaust
Standard va lue--->0.030-0.050 10.0012-0.0020 inl
Serviceable limit--->Replace if over 0.08 1 0.0032 inl
1 61 O ute r va lve spr ing (Fig. 3- 30)
Standard Va lue Serviceable Limit
27.4 I 1.080 in .I
Replace if under •
Free length
( 28. 1
J
11. 110 in.)
26.2 I 1.030 in.)
(26.9] I 1.060 in.)
5.4±0.30 kg / 24.9 mm
111.9±0.66 lbs/
0.980 in.)
Replace if under
Spring
7.2±0.55 kg / 24.9 mm
15.2 kg / 19.7 mm
pressure
116.0± 1.2 1 b/ 0.980 i n.l
133.4 lb / 0.780 in.)
Rep lace if under
6.4/ 24.9 mm
I 14.0 lb/ 0.98 in.)
16.8±0.8 kg / 19.7 mm
137.0± 1.76 lb/
0.780 in.l
Replace if under
Spring
19.0± 1.4 kg / 19.7 mm
4.6 kg / 24.9 mm
pressu re 142.0± 3.1 lb / 0.780 in.)
110 lb/ 0.980 i n.)
Replace i f under
17.3 kg / 1.7 mm
138.0 lb/ 0.067 in.)
- ··f
1° 30 ' Replace if over
2 0
r-ree
lecgth 25.1 1 0.990 in.)
Replace if ov er
23.9 1 0.940 in.l
71 Inner valve spring (Fig. 3- 31)
Sta dard Va ue Servi cea ble Li mit
Spring 2.6±0.15 kg / 22. 7 mm
Replace if under
pressu re
15.7 ± 0.33 b / 0.890 in.l
2.0 kg / 22.7 mm
-
14.4 lb/ 0.890 in.l
- - - -
Spring
8.2 ± 0.4 kg/ 17.5 mm
Replace if under
..,
11 8 .0±0.88 :b/
7.2 kg / 17.5 mm
oressure
0.690 in.l
I 15.8 lb/ 0.690 in.)
Tilt
1° 30 '
Replace if over
20
4. CAMSHAFT
In a four stroke cy cle engi ne, the camshaft makes
one re vo lution for every two revolut ions of the crank-.
shaft. The power t o drive the camshaft is through
the com chain d riven by the cra nkshaft spr ocket.
The lubricating o il is pressure- fed i nto the right
side of the camshaft and is force d o ut of th e ho les
in the com to lubricate t he
COIT)
surfaces, rock er orrTis
a nd the slippers. The
com~ho f t
is mode of specia l
cost st eel with the com and the bearing ar ea being
precisionly ground after heat treatment. The camshaft
is supported at both ends by the bear ings i n the ·
cyli nder head, a com sprocket is i nstalled on the left
end of the camshaft wit h 6mm bo lts a nd is drive n at
one half crankshaft speed by t he timing sprocket press-
tilt ed to the crankshaft end, by means of a light
weight endless chain. (Fig. 3-23, 3-33)