Yamaha YZF-R1S Service Manual - Eng
5-93
CRANKSHAFT
ENG
CAUTION:
EAS00395
CHECKING THE CRANKSHAFT
1. Measure:
Scrankshaft runout
Out of specification
! Replace the crank-
shaft.
Crankshaft runout
Less than 0.03 mm (0.0012 in)
2. Check:
Scrankshaft journal surfaces
Scrankshaft pin surfaces
Sbearing surfaces
Scratches / wear
! Replace the crankshaft.
CHECKING THE CRANKSHAFT DRIVE
SPROCKET
1. Check:
Scrankshaft drive sprocket
1
Cracks / damage / wear
! Replace the de-
fective part(s).
CHECKING THE CRANKSHAFT JOURNAL
BEARINGS
1. Measure:
Scrankshaft-journal-to-crankshaft-journal-
bearing clearance
Out of specification
! Replace the crank-
shaft journal bearings.
Crankshaft-journal-to-crankshaft-
journal-bearing clearance
0.014
X 0.037 mm
(0.0006
X 0.0015 in)
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.