Yamaha XS750, Руководство пользователя

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I
Run-out limit: .03mm
(.001 in.)
I
If run-out exceeds limit, replace crank.
2. Inspection Of Inserts
Check the bearing inserts. If the inner orouter
surface
is burned, flaked, rough, scratched or
worn, the insert should be replaced.
3. Measuring Main Bearing Oil Clearance
a. Clean all crankshaft and crankcase journal
LEFT CENTER
surfaces.
b. Place upper crankcase half upside-down on a
bench. Install bearing inserts into top crank-
case.
c. Install crankshaft into upper crankcase.
d. Place Plastigauge on crankshaft journal surface
t o be inspected.
NOTE:
Do not move crankshaft until clear-
ance check has been completed.
e.
Install bearings inserts into bottom crankcase.
Carefully, place lower crankcase onto upper
crankcase.
f. Install crankcase holding bolts 1 through 10.
Tighten to full torque in torque sequence
cast on crankcase.
g. Remove bolts in reverse assembly order
(10,9,8..
. .
.etc.)
h. Carefully remove lower crankcase. Measure
width of Plastigauge on crankshaft journals to
determine clearance.
Main bearing oil clearance:
.022~.044mm
(.0008~.0017 in.)
4. Crankshaft Main Bearing Selection
a.
Numbers used
to
indicate crankshaft journal
sizes are stamped on the L.H. crank web. The
first four (4) are main bearingjournal numbers,
starting with the left journal and proceding to
left center, right center, and right. The three
(3)
rod bearing journal numbers follow in
the same sequence.
b. Each main bearing journal
is
numbered 1, 2
or
3.
Each crankcase bearing housing is num-
bered 4, 5 or 6. The proper insert selection is
made by subtracting the crankcase number
from the crankshaft journal number. The
result
is the insert size (number).
I
TOP CRANKCASE
Use
the color code table to choose the pro-
per insert.
INSERT COLOR CODE
No. 1
No.
2
No.
3
No. 4
No.
5
Blue
Black
Brown
Green
Yellow
EXAMPLE:
Case No. (Minus) Journal No.
=
Insert No.
4
-
2
No. 2 insert is Black. U s e a black main bearing
insert.