Piston Ring Disassembly; Piston Dimensions Diagram; Piston Ring Groove Dimensions Diagram; Piston And Piston Ri Ng Inspection - Honda C50 Shop Manual

c
--~
=
.=--:l ...
oin.
=:::e.
(Fig . 3-48)
Pist on and Piston Ring Inspection
Remove th e deposits from t he t o p o f the piston,
inside and from the ring g rooves without scratch-
ing or causing damages to the piston. Do not
use sandpaper to perform this task.
l2l Piston [
J
are fo r C50, C50M, S50
Standard Value Serviceable limit
43.5 mm I 1.710 in .)
Piston
+O 10.000 in.)
dio.
-0.05 10.002 in.)
crown
38.6 11 .521 in .)
(
~ ~.05 )
1 0.000 in.)
10.002 in.l
44 mm I 1.734 in.)
+ O
- 0.020 10.001 in.l
39 11.540 in.)
+O
Maximum -0.02 10.001 in .) Replace if under
dio. D=44 mm 11.734 in.)
43.9 11.730 in.)
+O
-0.020 1 0.00 1 in.)
39 11.540 in.l
( +O ) IO.OOOl
, -0.02 10.001 in.l
D1=DO
-0.070 10.003 in .)
-0.090 10.004 in .)
( -0.075 )'0.0 030 in .)
Toper
-0.095 10.0037 in .)
D2=DO
-0.230 10.01 in.)
-0.250
10.01 !n")
( -0.16) 10.006 in.)
-0. 18 1 0.007m.l
0.168- 0 .188
Eccentricity
10.0066- 0.0074 in.)
( 0.150 - 0. 170]
10.0059 - 0.0067 inl
(3) Piston r ing groove [
J
are for S50
Standard Value Serviceable Limit
39.4 mm
I 1.552 in.)
+O
Groove -0. 1 10.004 in.l
bottom dio .
34.6 mm I 1.363 in.)
( ~~.1)
10.004 in.l
Thickness
1.2 10.047 in.)
Rep lace if over
+0.020
10.0008 in.)
ltop, 2nd)
+0.005
1 0.0002 in.)
1.27 10.50 in.)
2.5 10.099 in.)
Replace if over
Oil ring
+0.020 10.0008 in.)
-0
I 0
)
2.51 10.989 in .)
DER
EAD
23
Heat dissi pation
Figure 3- 47. Pisto n ring hea t transfe r function
clip
Figure 3- 48. Removing piston
- - -44p+O - -
-0.020
- ( 1.734
~gOOI
;,)-
Figure 3- 49. ·Piston dimensions
Figure 3- 50. Piston ring groove dimensions