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CRANKCASE
5-67
EAS1SL5283
CHECKING THE CRANKCASE
1. Wash:
• Crankcase
TIP
• Wash the crankcase in a mild solvent.
• Remove any remaining gasket from the
crankcase mating surface.
2. Check:
• Crankcase
Crack/damage
Replace.
• Oil delivery passages
Obstruction
Blow out with compressed
air.
EAS1SL5284
ASSEMBLING THE CRANKCASE
1. Install:
• Bearing cover plate
TIP
• Install the bearing by pressing its outer race
parallel.
• To prevent the bearing cover plate screw
(crankshaft) “1” from becoming loose, crimp
the screw head periphery “a” into the concave
“b” using a punch etc. In so doing, take care
not to damage the screwdriver receiving hole
in the screw.
2. Apply:
• Sealant
(to the crankcase mating surface)
3. Install:
• Dowel pin “1”
• Crankcase “2”
(to the left crankcase)
TIP
• Apply the lithium-soap-based grease on the
O-ring.
• Fit the right crankcase onto the left crankcase.
Tap lightly on the case with soft hammer.
• When installing the crankcase, the connecting
rod should be positioned at top dead center
(TDC).
• Tighten the bolts in a crisscross pattern in two
(2) stages, with 1/4 turn each.
Bearing cover plate
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
LOCTITE®
Bearing cover plate (crankshaft)
18 Nm (1.8 m·kgf, 13 ft·lbf)
Three Bond No.1215®
90890-85505
T
R
.
.
a
b
1
1
Crankcase bolt
12 Nm (1.2 m·kgf, 8.7 ft·lbf)
3. 45 mm (1.77 in)
4. 65 mm (2.56 in)
5. 75 mm (2.95 in)
T
R
.
.
5
3
5
3
3
3
4
5
4
3
1
1
2
Summary of Contents for YZ450FF 1SL-28199-11
Page 6: ...EAS1SL5006 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY...
Page 10: ......
Page 38: ...CLEANING AND STORAGE 1 26...
Page 66: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27...
Page 68: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29...
Page 70: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 31...
Page 72: ...CABLE ROUTING DIAGRAM 2 33 EAS1SL5066 CABLE ROUTING DIAGRAM...
Page 74: ...CABLE ROUTING DIAGRAM 2 35...
Page 76: ...CABLE ROUTING DIAGRAM 2 37...
Page 78: ...CABLE ROUTING DIAGRAM 2 39...
Page 80: ...CABLE ROUTING DIAGRAM 2 41...
Page 82: ...CABLE ROUTING DIAGRAM 2 43...
Page 122: ...ELECTRICAL SYSTEM 3 38...
Page 135: ...REAR WHEEL 4 11 1 2...
Page 192: ...CHAIN DRIVE 4 68...
Page 278: ...WATER PUMP 6 7...
Page 290: ......
Page 297: ...CHARGING SYSTEM 8 7 2 AC magneto 3 Rectifier regulator 4 Joint connector 5 Condenser...
Page 299: ...CHARGING SYSTEM 8 9...
Page 325: ...FUEL PUMP SYSTEM 8 35...
Page 326: ...ELECTRICAL COMPONENTS 8 36 EAS1SL5334 ELECTRICAL COMPONENTS EAS1SL5335 9 10 1 2 3 4 5 6 7 8...
Page 328: ...ELECTRICAL COMPONENTS 8 38 EAS1SL5336 CHECKING THE SWITCHES B Y P Sb 2 1...
Page 329: ...ELECTRICAL COMPONENTS 8 39 1 Engine stop switch 2 Neutral switch...
Page 344: ...LIST OF SELF DIAGNOSTIC AND FAIL SAFE ACTIONS 9 7...