Yamaha RS90K Manuel D'atelier page 548

P2
P3
P1
È
P1
P2
P3
CRANKCASE
15. Select:
• Big end bearings (P1 ~ P3)
NOTE:
• The numbers È stamped into the crankshaft web
and the numbers 1 on the connecting rods are
used to determine the replacement big end bear-
ing sizes.
• "P1" ~ "P3" refer to the bearings shown in the
crankshaft illustration.
Selection of bearings:
• For example, if the connecting rod "P1" and the
crankshaft web "P1" numbers are "5" and "1"
respectively, then the bearing size for "P1" is:
Bearing size for "P1":
"P 1" (connecting rod) – "P1" (crankshaft
web) – 1 = 5 – 1 – 1 = 3 (brown)
BIG END BEARING COLOR CODE
0
1
2
3
4
5
16. Inspect:
• Crankcase:
Cracks/damage → Replace.
NOTE:
• Thoroughly wash the crankcase halves in a mild
solvent.
• Thoroughly clean all the gasket surfaces and
crankcase mating surfaces.
• Oil delivery passages
Obstruction → Blow out with compressed air.
17. Inspect:
• Bearings
Clean and lubricate the bearings, then rotate
the inner race with your finger.
Rough movement → Replace.
18. Inspect:
• Oil seals
Damage/wear → Replace.
5-65
ENG
white
blue
black
brown
green
yellow