Yamaha RS90GTZ Service Manual page 308

CRANKSHAFT AND BALANCER SHAFT
7. Select:
• Crankshaft journal bearings (J1 ~ J4)
TIP
• The numbers
web and the numbers
lower crankcase are used to determine the
replacement crankshaft journal bearing sizes.
• "J1 ~ J4" refer to the bearings shown in the
crankshaft web and lower crankcase illustra-
tion.
• If "J1 ~ J4" are the same, use the same size
for all of the bearings.
Selection of bearings:
For example, if the crankcase "J1" and crank-
shaft web "J1" numbers are "6" and "1" respec-
tively, then the bearing size for "J1" is:
Bearing size for J1:
J1 (crankcase) –
J1 (crankshaft web) + 2
= 6 – 1 + 2 = 7
CRANKSHAFT JOURNAL BEARING
COLOR CODE
2
3
4
5
6
7
8
5-83
ENG
stamped into the crankshaft
stamped into the
black
brown
green
yellow
pink
red
white