Honda C50 - Measuring Piston Ring Tension; Piston Compression Rings (Top and Second) Diagram; Piston Oil Ring for C50, C50 M, S50 - Diagram; Piston Pin Clearance Diagram

24
2 ±0 .1
(1.8 ± 0. 1)
I 2 -+10l
. -0.025
I
Figure 3- 5 1. P is:o-
Oil ri ng
Figure 3- 52 .
T op ring
Figure 3- 53. Meas uri ng piston ring tension
Fi9ure 3- 54. Pi ston p in cle ara nce
3. EN GINE
second)
{3) Piston to cylinder mi nimum clearance
Standard
value ->0. 0 10 10.0004 in)
Serviceable
limit->Replace if ov er 0.12 10 .0 047 in)
14) Piston pin bo re
+ 0. 008 (0.5120 +0.0 003 in)
Standard value->13mm+0. 00
2
+0 .000
1
in .
Serviceable
limit->Replace if ov er 0.12 10.0047 in)
{5) Oversize pist on
Standard-> 0.25 10.0099 i n)
{6) Piston ring, compre ss ion, [ J are for C50, C50M,
S50 (Fig. 3-50, 3- 51)
Stan dard Value Servi ce able Limit
1.2 ( 0.473 in .I
Replace if under
Wi dth - 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 Re pl ace if under
( 0.16- 0. 44]
0.
25 kg
!55\b s)
Ring closi ng
\3.5-9.7 l bs) (0 .10] !22\bsl
force
0.35-0.65 kg
(.77 -1.43 \b )
Repla
ce
if under
( 0.34 - 0. 62 ] 0.2 kg
(44
\b)
(.75-1.36 lbsl
0.15 - 0. 35
Ri ng
end 1.0059-0138 in .l
Rep lace
if ov er
gop
(0.1- 0.3] 0.5
(0.0197 in .)
!0.0 04-0.01 18 in.)
17 1 Side clearance, co mpr ess ion
Standard
valu e-> 0.01 5-0.045 10.0006- 0.00177 i n)
Se rviceable limit->Repl ac e if ov er 0.1 2 (0.0047 in)
18) Oil ring [ J are for C5 0, C5 0M, S5 0(Fig. 3- 52, 3- 53) .·
S ondord Va lu e
Service
ab le Lim it
2.5 !0 . 099 in.)
Re
place
if und er
,',jo ·h
- 0. 010 !0.0004 in.l
- 0. 025 !0.001 0 in .)
24 .2 (0 .953 in.)
2 = 0.1
Re pla ce
if under
10 . 099±0.004 in .l
T ' c(ress
=1.8::::0.1]
1.8
(0 .0 71 in .)
(0 .071 + 0. 00 04 in .I
( 1. 6]
(0 .0 63 i n.)
0.5-0.8 kg
Rep l ac e
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)
Rin g
end
0. 1-0 . 35
Repla ce if ove r
(0.004 -0. 0 14 i n.)
go p
( 0. 30 ]
(0.12
in.)
0 .50 !0.020 in.)
( 9) Side cl eance, oil ri ng
St andard value -> 0.01 0-0.045 ( 0.0004-0.0017 in)
Service able limit -> Replace if ov er 0.12 10.005 in)
(1 0) Over si ze piston ring
Stan
dard oversize -> 0.25 (0 . 01 i n)
(1 1) Pi ston [ J ar e for S5 0 (Fig. 3- 54)
S tandar d Value
13 mm (0.512 in.l
Out side 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
(3 0.7] ( 1.21 i n. l
+ 0.2 (0 .0 08 in.)
- 0 (- 0 in.)
Service
ab le li mit
Re pla ce if und er
12. 98 (0.5 11 in.)
(12) Pi ston pin to piston clearance
St andard value -> 0.002 -0.01 4 (0.00008-
0.00055
i n)
Se rviceable limit -> Replace if over 0.05 (0.0020 i n)