Yamaha YZF-R15, Service Manual

Page: 223 / 338

5-61
CRANKSHAFT
REMOVING THE CRANKSHAFT
1. Remove:
• Crankshaft “1”
NOTE:
• Remove the crankshaft with the crankcase
separating tool “2”.
• Make sure the crankcase separating tool is
centered over the crankshaft.
CAUTION:
• To protect the end of the crankshaft, place
an appropriate sized socket between the
crankcase separating tool bolt and the
crankshaft.
• Do not tap on the crankshaft.
CHECKING THE CRANKSHAFT
1. Measure:
• Crankshaft runout
Out of specification → Replace the crank-
shaft, bearing or both.
NOTE:
Turn the crankshaft slowly.
2. Measure:
• Big end side clearance
Out of specification → Replace the crank-
shaft.
3. Measure:
• Crankshaft width
Out of specification → Replace the crank-
shaft.
4. Check:
• Crankshaft sprocket
Damage/wear → Replace the crankshaft.
• Bearing
Cracks/damage/wear → Replace the crank-
shaft.
5. Check:
• Crankshaft journal
Scratches/wear → Replace the crankshaft.
• Crankshaft journal oil passage
Obstruction → Blow out with compressed air.
INSTALLING THE CRANKSHAFT
1. Install:
• Crankshaft “1”
Crankcase separating tool
YSST-265
Runout limit C
0.030 mm
1
2
Big end side clearance D
0.110–0.410 mm
Width A
47.95–48.00 mm
CAUTION:
To avoid scratching the crankshaft and to
ease the installation procedure, lubricate the
oil seal lips with lithium-soap-based grease
NOTE:
Hold the connecting rod at top dead center
(TDC) with one hand while turning the nut of the
crankshaft installer bolt with the other. Turn the
crankshaft installer bolt until the crankshaft bot-
toms against the bearing.
5-62
CRANKSHAFT