2014 YAMAHA YZ450F steering

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Page 30 of 360

YAMAHA YZ450F 2014  Owners Manual SPECIAL TOOLS
1-16
Radiator cap tester
90890-01325
Mityvac cooling system tester 
kit
YU-24460-A
This tool is used to check the 
radiator and the radiator cap.
Radiator cap tester adapter
90890-01352

Page 39 of 360

YAMAHA YZ450F 2014  Owners Manual TORQUE-CHECK POINTS
1-25
EAS1SL1048
TORQUE-CHECK POINTS
Frame constructionFrame to rear frame
Frame to engine protector
Combined seat and fuel tankFuel tank to frame
Engine mountingFrame to engine
Eng

Page 52 of 360

YAMAHA YZ450F 2014  Owners Manual CHASSIS SPECIFICATIONS
2-9
Brake disc thickness limit 2.5 mm (0.10 in)
Brake pad lining thickness (inner) 4.4 mm (0.17 in)
Limit 1.0 mm (0.04 in)
Brake pad lining thickness (outer) 4.4 mm (0.17 in)
Li

Page 61 of 360

YAMAHA YZ450F 2014  Owners Manual TIGHTENING TORQUES
2-18
CHASSIS TIGHTENING TORQUES
TIP
- marked portion shall be checked for torque tightening after break-in or before each race.
ITEMThread 
sizeQ’tyTIGHTENING TORQUESRemarks
Outer

Page 63 of 360

YAMAHA YZ450F 2014  Owners Manual TIGHTENING TORQUES
2-20
TIP
1. First, tighten the lower ring nut approximately 38 Nm (3.8 m·kgf, 27 ft·lbf) by using the steering nut 
wrench, then loosen the lower ring nut one turn.
2. Retighten t

Page 66 of 360

YAMAHA YZ450F 2014  Owners Manual LUBRICATION POINTS AND LUBRICANT TYPES
2-23
CHASSIS
Lubrication pointLubricant types
Upper bearings (steering head)
Upper bearings and bearing race cover (steering head)
Lower bearings and oil seal li

Page 88 of 360

YAMAHA YZ450F 2014  Owners Manual CHECKING THE WHEEL BEARINGS ..................................................... 3-33
CHECKING AND ADJUSTING THE STEERING HEAD .......................... 3-33
LUBRICATING THE LEVERS .................

Page 93 of 360

YAMAHA YZ450F 2014  Owners Manual MAINTENANCE INTERVALS
3-5
Replace brake flu-
id
Every one year
SWINGARM
Inspect, lube and 
retightenMolybdenum disulfide grease
RELAY ARM, CON-
NECTING ROD
Inspect, lube and 
retightenMolybdenum disul
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