Piston Compression Rings (Top And Second) Diagram; Piston Oil Ring For C50, C50M, S50 - Diagram; Measuring Piston Ring Tension; Piston Pin Clearance Diagram - Honda C50 Shop Manual

24
2±0. 1
(1.8 ± 0. 1)
I 2 -+10l
. -0.025
I
Figure 3- 5 1. Pis:o-
Oil ring
Figure 3- 52.
T op
ring
Figure 3- 53. Measuri ng pisto n ring tension
Fi9ure 3- 54. Pi ston pin clearance
3. EN GINE
seco nd)
{3) Piston to cylinder minimum cl earance
Standard va lue->0. 0 10 1 0.0004 in)
Serviceable limit->Replace if over 0. 12 10.0047 in)
1 4) Piston pin bore
+ 0 .008( 0.5120 +0.0003 in)
Standard value->13mm+0. 00 2 +0.000 1 in .
Serviceable limit->Replace if over 0. 12 10.0047 in)
{5) Oversize piston
Standard->0.25 10.0099 in)
{6) Piston ring, compression, [
J
are for C50, C50M,
S50 (Fig. 3-50, 3- 51)
Standard Value Serviceable Limit
1.2 (0.473 in
.I
Replace if under
Width - 0.010 (0.0004 in.)
- 0.025 (0.0010 in.)
1.12
(0.044 in.l
Thickne ss
2 (0.079 in.)
Replace if under
±0.01 !0.04 in .)
1.8
(0.07 in .)
0.3- 0.6 kg
!0.66-1 .30 ibsl R e place if unde r
( 0. 16- 0.44] 0.25 kg !55\bs)
Ring closing
\3.5-9.7 lbs) (0.10] !22\bsl
force
0.35-0.65 kg
(.77 -1.43 \b)
R e place
if unde r
( 0.34- 0.62] 0.2 kg
(44 \b)
(.75-1.36 lbsl
0.15- 0.35
R ing end 1.0059-0138 in.l Rep lace if over
gop
(0.1 - 0.3 ] 0.5
(0.0197 in.)
!0.004-0.01 18 in.)
171 Side clearance, co mpression
Standard value->0. 015-0.045 1 0 .0006 - 0.00177 i n)
Serviceable limit->Replace if over 0.1 2 (0.0047 in)
18) O il ring [
J
are for C50, C50M, S50(Fig. 3- 52, 3- 53) .·
S ondord Va lue Serviceable Limit
2.5 !0.099 in.)
R e place if under
,',jo·h
- 0.010 !0.0004 in.l
- 0.025 !0.001 0 in .)
24.2 (0 .953 in.)
2 = 0.1
Re place
if unde r
10.099±0.004 in.l
T 'c(ress
=1.8::::0.1]
1.8
(0 .071 in.)
(0.07 1
+
0.0004 in .I
( 1.6]
(0.063 in.)
0.5-0.8 kg
Replace if under
Ring closing (1.1- 1.8 \b)
force (0.45 - 0.75 kg]
0.35 kg
(0 .77 \bl
(1.0 - 1.65 \bl
( 0 .30 kg]
(0.66\b)
Ring end
0 .1-0.35
R e place if ove r
(0.004 -0.0 14 in.)
gop
( 0.30]
(0. 12 in.)
0.50 !0.020 in.)
(9) Side cl eance, o il ri ng
Sta ndard value->0.0 10-0.045 (0.0004-0.0017 in)
Servi ceable limit->Replace if over 0. 12 10.005 in)
(1 0) O versize pisto n ring
Sta ndard o versize->0.25 (0.01 i n)
(1 1) Pist o n [
J
are fo r S50 (Fig. 3- 54)
Standard Va lue
13 mm (0.5 12 in.l
Outside dio + O ( +O in .)
Heig ht
+ 0.006 (0.0002 in .)
35.4 ( 1.395 in.)
+ 0.2 (0.008 in.l
- 0 (- 0 in .l
(30 .7] ( 1.2 1 in.l
+ 0.2 (0 .008 in.)
- 0 ( - 0 in.)
Se rviceable limit
Re place if under
12.98 (0.5 11 in.)
(12) Pist o n pin t o pist o n cl earance
Standard value->0.002 -0.01 4 (0.00008 -
0.00055 i n)
Serviceable limit->Replace if o ver 0.05 (0.0020 in)