Removing The Crankshaft And Balancer Shaft; Checking The Oil Nozzles; Checking The Crankshaft - Yamaha YZF-R1 Series 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
• Oil nozzle 2
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)
G089018
CRANKSHAFT AND BALANCER SHAFT
2. Check:
• Crankshaft journal surfaces
• Crankshaft pin surfaces
• Bearing surfaces
3. Measure:
• Crankshaft-journal-to-crankshaft-journal-
ECA13920
NOTICE
Do not interchange the crankshaft journal
bearings. To obtain the correct crankshaft-
journal-to-crankshaft-journal-bearing clear-
1
ance and prevent engine damage, the crank-
shaft journal bearings must be installed in
their original positions.
TIP
Align the projections "a" on the crankshaft jour-
nal upper bearings with the notches "b" in the up-
per crankcase.
G089019
TIP
Do not put the Plastigauge® over the oil hole in
the crankshaft journal.
5-92
Scratches/wear → Replace the crankshaft.
Scratches/wear → Replace the crankshaft
journal bearing.
bearing clearance
Out of specification → Replace the crank-
shaft journal bearings.
Journal oil clearance
0.025–0.043 mm (0.0010–0.0017
in)
a. Clean the crankshaft journal bearings,
crankshaft journals, and bearing portions
of the crankcase.
b. Place the upper crankcase upside down
on a bench.
c. Install the crankshaft journal upper bear-
ings "1" and the crankshaft into the upper
crankcase.
d. Put a piece of Plastigauge® "1" on each
crankshaft journal.
1
a
b