Crankshaft And Balancer Shaft; Removing The Crankshaft And Balancer Shaft; Checking The Oil Nozzles; Checking The Crankshaft - Yamaha Tracer MT09TRAH 2017 Service Manual

EAS31171
REMOVING THE CRANKSHAFT AND
BALANCER SHAFT
1. Remove:
• Balancer shaft "1"
• Balancer shaft journal bearing
• Crankshaft assembly "2"
• Crankshaft journal bearings
TIP
Identify the position of each balancer shaft jour-
nal bearings and crankshaft journal bearings so
that it can be reinstalled in its original place.
2
EAS31174

CHECKING THE OIL NOZZLES

The following procedure applies to all of the oil
nozzles.
1. Check:
• Oil nozzle "1"
Damage/wear  Replace the oil nozzle.
• Oil passage
Obstruction  Blow out with compressed air.
EAS31075

CHECKING THE CRANKSHAFT

1. Measure:
• Crankshaft runout
Out of specification  Replace the crank-
shaft.
Runout limit
0.030 mm (0.0012 in)

CRANKSHAFT AND BALANCER SHAFT

2. Check:
3. Measure:
1
ECA13920
NOTICE
Do not interchange the crankshaft journal
bearings. To obtain the correct crankshaft-
journal-to-crankshaft-journal-bearing clear-
ance and prevent engine damage, the crank-
shaft journal bearings must be installed in
their original positions.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Clean the crankshaft journal bearings, crank-
b. Place the upper crankcase upside down on a
c. Install the crankshaft journal upper bearings
TIP
Align the projections "a" on the crankshaft jour-
nal upper bearings with the notches "b" in the up-
per crankcase.
5-72
• Crankshaft journal surfaces
• Crankshaft pin surfaces
• Bearing surfaces
Scratches/wear  Replace the crankshaft.
• Crankshaft-journal-to-crankshaft-journal-
bearing clearance
Out of specification  Replace the crank-
shaft journal bearings.
Journal oil clearance
0.014–0.038 mm (0.0006–0.0015
in)
shaft journals, and bearing portions of the
crankcase.
bench.
"1" and the crankshaft into the upper crank-
case.