Yamaha F4B Service Manual page 139

Driver rod LL b: 90890-06605
Ball bearing attachment c: 90890-06632
2. Install a new oil seal d.
e
f
d
Driver rod LS e: 90890-06606
Ball bearing attachment f:
90890-06655
3. Install the crankshaft g and washer h.
h
g
4. Assemble the piston i, connecting rod
a, piston pin j, and clips k.
a
b
d
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.
#5
#1
#4
10˚
#3
10˚
#5
#2
Cylinder block
k
c
i
j
k
e
h
#4
f
#3
g
#2
#1
h
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A