Yamaha RD125C Servicehandbuch Seite 323

R D 1 2 5 C C I H 8 ) R D 1 2 5 - C - D X U H 8 ) R X 1 2 5 I 1 N 2 )
R D 2 0 0 C I 1 J 1 ) R D 2 0 0 C ( 1 H 9 ) R D 2 0 0 C - D X ( 1 H 9 ) N R 2 0 0 I 1 N 8 ) R D 1 2 5 - D X R D 2 0 0 - D X
Compression ratio 6.8 : 1
CT
CT
7.1 : 1
CT CT
CT
6.8 : 1 7.1 : 1
Starting System Primary kick
CT CT
Primary kick
CT CT CT
Primary kick Seif and pri-
Starter and electric
Starter mary kick
Starter
Starter
Ignition System Battery ignition
CT CT CT CT CT CT CT CT
Lubrication System Separate lubricant
«-
+"
CT
«-
CT
CT CT
< _
(Yamaha
Autolube)
C y l i n d e r head:
C o m b u s t i o n Chamber volume 7 . 2 ± 0 . 1 5 c m
3
CT *-
1 2 . 0 ± 0 . 2 5 c m
3
CT CT
1 3 . 3 ± 0 . 2 5 c m
3
7 . 2 ± 0 . 1 5 c m
3
1 2 . 0 ± 0 . 2 5 c m
3
(B-7ES) (B-7ES)
( B - 7 E S ) ( N G K B-8ES) ( N G K B-8ES)
C o m b u s t i o n Chamber type
D o m e + Squish
CT CT CT CT CT
<—
CT
Head gasket thickness 0.5 m m
CT CT CT CT CT CT
Tightening torque:
C y l i n d e r head holding nut
0 . 5 ~ 0 . 8 m - k g *"
CT
0 . 5 ~ 0 . 8 m-kg
CT CT CT
0.5—0.8 m-kg 0 . 5 ~ 0 . 8 m - k g
[ M C
p i n i
U V I O r 1 . U l
(M7 P1 n i
| IVI / •
1
. U
1
(Mfi P I 0)
\ IVIU l 1 . U l
i M 7 P I n i
| IVI / r
1
. U l
Spark plug 1 . 5 ~ 2 . 5 m-kg
CT CT
<-
CT CT CT CT CT
(M14 P1.25)
Cylinder:
Material A i u m i n u m alloy
CT . CT CT CT CT
with cast iron
sleeve
Bore size « +0.02
m m
CT
*" 52 +0.02
m m
CT CT CT
4 3 . 0 0 ~ 4 3 . 0 2 5 2 . 0 0 - - 5 2 . 0 2
m m m m
Taper limit 0.05 m m
CT CT CT CT CT CT
Out of round limit 0.01 m m
CT
+ "
CT CT *• CT CT *"
Piston:
Piston skirt clearance 0 . 0 3 5 ~ O . 0 4 0 m m
CT CT CT CT CT CT *~ CT
Piston over size 4 3 . 2 5 m m
CT CT
52.25 m m
CT CT CT
43.25 m m 52.25 m m
4 3 . 5 0 m m
CT CT
52.50 m m
, —
CT CT
43.50 m m 52.50 m m
4 3 . 7 5 m m
CT
52.75 m m
CT CT CT
4 3 . 7 5 m m 52.75 m m
A A nn
44.DU m m
CT CT
a r\r\
53.00 m m
CT CT CT
44.00 m m 53.00 m m
Piston ring outside diameter 12mm x 3 5 m m
CT CT
14mm x 41 m m
CT CT CT
1 2 m m x 3 5 m m 1 4 m m x 4 1 m m
x length
Piston ring:
Piston ring design:
T o p Keystone ring
CT CT
K e y s t o n e ring
CT CT CT
Keystone ring Keystone ring
(1.5 m m ) (1.2 m m ) (1.5 mm) (1.2 m m )
2 n d Keystone ring
CT CT
Keystone ring
CT CT CT
Keystone ring Keystone ring
(1.5 m m ) (1.2 m m ) (1.5 mm) (1.2 mm)
Ring end gap (installed):
T o p 0 . 2 ~ 0 . 4 m m
CT CT
0 . 3 ~ 0 . 5 m m
CT CT CT
0 . 2 ~ 0 . 4 m m 0 . 3 ~ 0 . 5 m m
2 n d 0 . 2 ~ 0 . 4 m m
CT
0.3—0.5mm
CT CT CT
0 . 2 ~ 0 . 4 m m
0 . 3 ~ 0 . 5 m m
2 9 9