Honda C65 - Piston and Piston Ri Ng Inspection; Piston Dimensions Diagram; Piston Ring Disassembly; Piston Ring Groove Dimensions Diagram

c
--~ = .=--:l ... oin.
=:::e.
(Fig. 3-4 8)
Pist on and Pi ston Ring Inspection
Remove the deposits f rom the top o f the piston,
i
nsi de and from the ring gr ooves wi t hout scratch-
in g or causing damages to the piston. Do not
us e sandpaper to perform this ta sk .
l2l
Pi ston [ J are for C50, C5 0 M, S50
St andard Value Serviceable li mit
43.5 mm
I 1.710 in .)
Piston
+O
10.000 in .)
dio.
-0.0 5 10.002 i n. )
crown
38.6
11 .521 in .)
(
~ ~ . 05 )
10. 000 in.)
10.002 in.l
44 mm I 1.734 in.)
+ O
- 0.
020 10 .001 i n.l
39
11.540 in.)
+O
Maxim um -0 . 02
10.001 in .) Rep l ace if under
dio.
D=44 mm
1
1. 734 in.) 43 .9
11 .730 in .)
+O
-0 . 020 1 0.00 1 i n. )
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 .)
(
-0.07 5 )'0 .0030 in .)
To
pe r
-0.095 10 . 0037 in .)
D
2=DO
-0.230
10 . 01 in.)
-0 . 250
10 . 01 !n ")
( -0.16) 10 . 006 i n.)
-0. 18 10. 007m.l
0.168 - 0.188
E
ccen tricity
10.0066- 0.0074 in .)
( 0.150- 0.1 70 ]
10 . 0059 - 0.0067 inl
(3) P iston ring groove [ J are f or S50
Standard Value
Servi
ceable 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 i n.)
Rep l ace if over
+0.020
10 . 0008 in .)
ltop, 2nd)
+0.005
1 0.0002 i n. )
1.27
10.50 in .)
2.5
1 0.099 in.)
Replace if over
Oi l ring +0 . 020
10 . 0008 in.)
-0
I 0
)
2. 51
10 . 989 in .)
DER
EAD
23
Hea t di ssi p ation
Figure 3- 47. Pi ston ring heat tran sfer function
clip
Fi gur e 3- 48. Remov ing piston
--- 44 p+O --
-0 .020
- ( 1.734 ~gOOI ; ,) -
Figure 3- 49 . · Pi ston dimensions
Figure 3- 50.
Pis to n ri ng g roove dimensions