Yamaha 55DEHD, Service Manual

Page: 113 / 269

6885J11
5-26
9
8
7
6
5
4
3
2
1
Crankcase
c C
Do not reuse the ball bearing, always
replace it with a new one.
Checking the cylinder bore
1. Measure the cylinder bore (D
1
–D
6
) at
measuring points
a
,
b
, and
c
, and in
direction
d
(D
1
, D
3
, D
5
), which is parallel
to the crankshaft, and direction
e
(D
2
,
D
4
, D
6
), which is at a right angle to the
crankshaft.
a
:10.0 mm (0.39 in) from the cylinder head top
surface
b
:35 mm (1.38 in) from the cylinder head top
surface
c
:80 mm (3.15 in) from the cylinder head top
surface
1
a b
c
d
e
D
2
D
4
D
6
D
1
D
5
D
3
68850430
Cylinder gauge
1
:
90890-06759
Cylinder bore diameter (D
1
–D
6
):
82.000–82.020 mm
(3.2283–3.2291 in)
Gear puller
4
: 90890-06540
Bearing separator
5
:
90890-06534
or commercially available tool.
Disassembling the crankshaft
1. Remove the roller bearing.
2. Remove the circlips
1
and main bear-
ings
2
.
3. Remove the circlip
3
, and then remove
the ball bearing.
6S650340
1
2
1
2
6885042a
3
6885042d
5
4
6885042b
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