Yamaha R1 Series 2015, Service Manual

Page: 426 / 704

CRANKSHAFT AND BALANCER SHAFT
5-85
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.
EAS31174
CHECKING THE OIL NOZZLES
The following procedure applies to all of the oil
nozzles.
1. Check:
• Oil nozzle 1 “1”
•
Oil nozzle 2 “2”
Damage/wear
o
Replace the oil nozzle.
•
Oil passage
Obstruction
o
Blow out with compressed air.
EAS31075
CHECKING THE CRANKSHAFT
1. Measure:
•
Crankshaft runout
Out of specification
o
Replace the crank-
shaft.
2. Check:
•
Crankshaft journal surfaces
• Crankshaft pin surfaces
Scratches/wear
o
Replace the crankshaft.
• Bearing surfaces
Scratches/wear
o
Replace the crankshaft
journal bearing.
3. Measure:
• Crankshaft-journal-to-crankshaft-journal-
bearing clearance
Out of specification
o
Replace the crank-
shaft journal bearings.
NOTICE
ECA13920
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.
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a. Clean the crankshaft journal bearings, crank-
shaft journals, and bearing portions of the
crankcase.
b. Place the upper crankcase upside down on a
bench.
c. Install the crankshaft journal upper bearings
“1” and the crankshaft into the upper crank-
case.
TIP
Align the projections “a” on the crankshaft jour-
nal upper bearings with the notches “b” in the up-
per crankcase.
Runout limit
0.030 mm (0.0012 in)
1
2
1 2
Journal oil clearance
0.027–0.045 mm (0.0011–0.0018
in)