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Run-out limit: .03mm (.001 in.)
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.
Measuring Main Bearing Oil Clearance
3.
a. Clean all crankshaft and crankcase journal
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 t o
determine clearance.
Main bearing oil clearance:
4. Crankshaft Main Bearing Selection
a. Numbers used
sizes are stamped on the L.H. crank web. The
first four (4) are main bearingjournal numbers,
starting with the left journal and proceding t o
left center, right center, and right. The three
rod bearing journal numbers follow in
(3)
the same sequence.
.022~.044mm
(.0008~.0017 in.)
indicate crankshaft journal
to
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LEFT CENTER
b. Each main bearing journal is numbered 1, 2
or
Each crankcase bearing housing is num-
3.
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).
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the color code table to choose the pro-
Use
per insert.
INSERT COLOR CODE
No. 1
No. 2
No. 3
No. 4
No. 5
EXAMPLE:
Case No. (Minus) Journal No.
-
4
No. 2 insert is Black. U s e a black main bearing
insert.
TOP CRANKCASE
Blue
Black
Brown
Green
Yellow
Insert No.
=
2
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