Yamaha YZF-R6 99, Service Manual

Page: 209 / 400

4-81
CRANKSHAFT
ENG
J
1
J
2
J
3
J
4
J
5
NOTE:
NOTE:
g. Remove the lower crankcase and the crank-
shaft journal lower bearings.
h. Measure the compressed Plastigauge

width
c
each crankshaft journal.
If the clearance is out of specification, select
replacement crankshaft journal bearings.
2. Select:
crankshaft journal bearings (J
1
J
5
)
The numbers stamped into the crankshaft web
and the numbers stamped into the lower
crankcase are used to determine the replace-
ment crankshaft journal bearing sizes.
“J
1
” “J
5
” refer to the bearings shown in the
crankshaft illustration.
If “J
1
” “J
5
” are the same, use the same size
for all of the bearings.
For example, if the crankcase “J
1
” and crank-
shaft web “J
1
” numbers are “6” and “2” respec-
tively, then the bearing size for “J
1
” is:
Bearing size for J
1
:
“J
1
” (crankcase) – “J
1
” (crankshaft
web) – 1=
6 – 2 – 1 = 3
CRANKSHAFT JOURNAL BEARING
COLOR CODE
0 White
1 Blue
2 Black
3 Brown
4 Green
If the size is the same for all “J
1
to J
5
”, one digit
for that size is indicated. (crankcase side only)