Yamaha F4B, Service Manual

Page: 139 / 202

7-46
Cylinder block
0
1
2
3
4
5
6
7
8
9
10
A
2. Install a new oil seal
d
.
3. Install the crankshaft
g
and washer
h
.
4. Assemble the piston
i
, connecting rod
a
, piston pin
j
, and clips
k
.
TIP:
• Face the “YAMAHA” mark
b
on the con-
necting rod
a
in the same direction as the
“UP” mark
c
on the piston crown.
• Do not align the clip end with the groove
d
in the piston pin boss.
5. Install the oil rings
e
, 2nd ring
f
, and
top ring
g
.
6. Offset the piston ring end gaps. NOTICE:
Do not scratch the pistons or break
the piston rings.
Driver rod LL
b
: 90890-06605
Ball bearing attachment
c
: 90890-06632
Driver rod LS
e
: 90890-06606
Ball bearing attachment
f
:
90890-06655
d
e
f
h
g
d
c
i
j
k
k
b
a
#1
#1
#2
#2
#3
#3
#4
#4
#5
#5
e
f
g
h
10˚
10˚
h