![Yamaha YZ450FF 1SL-28199-11 Owner'S Service Manual Download Page 252](http://html1.mh-extra.com/html/yamaha/yz450ff-1sl-28199-11/yz450ff-1sl-28199-11_owners-service-manual_4771065252.webp)
OIL PUMP AND BALANCER GEAR
5-57
EAS1SL5268
REMOVING THE BALANCER
1. Straighten the lock washer tab.
2. Loosen:
• Balancer nut “1”
• Primary drive gear nut “2”
• Balancer weight gear nut “3”
TIP
Place an aluminum plate “a” between the teeth
of the balancer drive gear “4” and balancer
weight gear “5”.
EAS1SL5269
CHECKING THE PRIMARY DRIVE GEAR,
BALANCER SHAFT DRIVE GEAR, AND
BALANCER WEIGHT GEAR
1. Check:
• Primary drive gear “1”
• Balancer shaft drive gear “2”
• Balancer weight gear “3”
Wear/damage
Replace.
EAS1SL5270
CHECKING THE BALANCER
1. Check:
• Balancer
Crack/damage
Replace.
EAS1SL5271
CHECKING THE OIL PUMP
1. Check:
• Oil pump drive gear
• Oil pump driven gear
• Oil pump housing
• Oil pump housing cover
Cracks/damage/wear
Replace the defec-
tive part(s).
2. Measure:
• Inner-rotor-to-outer-rotor-tip clearance “a”
• Outer-rotor-to-oil-pump-housing clearance
“b”
• Oil-pump-housing-to-inner-rotor-and-outer-
rotor clearance “c”
Out of specification
Replace the oil pump.
1
5
4
2
a
4
3
a
5
Inner-rotor-to-outer-rotor-tip
clearance
Less than
0.150 mm (0.0059 in)
Outer-rotor-to-oil-pump-housing
clearance
0.13–0.18 mm (0.0051–0.0071 in)
Oil-pump-housing-to-inner-and-
outer-rotor
clearance
0.06–0.11 mm (0.0024–0.0043 in)
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...