Checking The Crankcase; Checking The Bearings - Yamaha 2002 TDM900 Service Manual

CRANKSHAFT
g. Measure the compressed Plastigauge
width a on the crankshaft pin.
If the crankshaft-pin-to-big-end-bearing
clearance is out of specification, select re-
placement big end bearings.
6. Select:
S big end bearings (P1 X P2)
NOTE:
S The numbers A stamped into the crankshaft
web and the numbers 1 on the connecting
rods are used to determine the replacement
big end bearing sizes.
S "P1" X "P2" refer to the bearings shown in the
crankshaft illustration.
For example, if the connecting rod "P1" and the
crankshaft web "P1" numbers are "4" and "1" re-
spectively, then the bearing size for "P1" is:
"P1" (connecting rod) – "P1"
(crankshaft) =
4 – 1 = 3 (brown)
BIG END BEARING COLOR CODE
1
2
3
4
EAS00399

CHECKING THE CRANKCASE

1. Thoroughly wash the crankcase halves in a
mild solvent.
2. Thoroughly clean all the gasket surfaces and
crankcase mating surfaces.
3. Check:
S crankcase
Cracks/damage ! Replace.
S oil delivery passages
Obstruction ! Blow out with compressed air.
EAS00401

CHECKING THE BEARINGS

1. Check:
S bearings
Clean and lubricate the bearings, then rotate
the inner race with your finger.
Rough movement ! Replace.
5-79
ENG
blue
black
brown
green