2003 YAMAHA WR 450F lock

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Page 347 of 754

YAMAHA WR 450F 2003  Manuale de Empleo (in Spanish) ENG
 
4 - 23 
ARBRES A CAMES  
NOCKENWELLE  
ÁRBOLES DE LEVAS 
AUSBAU
Nockenwelle 
1. Demontieren: 
 
Schwungrad-Abdeckschrau-
be   
1  
  
 
Rotorzapfen-Abdeckschrau-
be   
2  
 
2. Ausrichten: 


Page 352 of 754

YAMAHA WR 450F 2003  Manuale de Empleo (in Spanish) 4 - 26
ENGCAMSHAFTS
Decompression system
1. Check:
Decompression system
Checking steps:
Check that the decompressor cam 1
moves smoothly.
Check that the decompressor lever pin 2
projects from the c

Page 354 of 754

YAMAHA WR 450F 2003  Manuale de Empleo (in Spanish) 4 - 27
ENGCAMSHAFTS
Fit the timing chain 3 onto both camshaft
sprockets and install the camshafts on the
cylinder head.
NOTE:
The camshafts should be installed onto the
cylinder head so that the exha

Page 356 of 754

YAMAHA WR 450F 2003  Manuale de Empleo (in Spanish) 4 - 28
ENG
With the rod fully wound and the chain
tensioner UP mark a facing upward,
install the gasket 1 and the chain ten-
sioner 2, and tighten the bolt 3 to the
specified torque.
T R..
Bolt (timi

Page 400 of 754

YAMAHA WR 450F 2003  Manuale de Empleo (in Spanish) 4 - 50
ENGCLUTCH
EC493000
REMOVAL POINTS
EC483211
Clutch boss
1. Remove:
Nut 1 
Lock washer 2 
Clutch boss 3 
NOTE:
Straighten the lock washer tab and use the
clutch holding tool 4 to hold the clut

Page 404 of 754

YAMAHA WR 450F 2003  Manuale de Empleo (in Spanish) 4 - 52
ENGCLUTCH
EC4A5000
ASSEMBLY AND INSTALLATION
Push lever
1. Install:
Push lever 1 
Bolt (push lever)
NOTE:
Apply the lithium soap base grease on the oil
seal lip.
Apply the engine oil on the

Page 406 of 754

YAMAHA WR 450F 2003  Manuale de Empleo (in Spanish) 4 - 53
ENGCLUTCH
3. Bend the lock washer 1 tab.
4. Install:
Friction plate 1
Clutch plate 2
NOTE:
Install the clutch plates and friction plates
alternately on the clutch boss, starting with a
frict

Page 424 of 754

YAMAHA WR 450F 2003  Manuale de Empleo (in Spanish)  
4 - 62
ENG
 
BALANCER
BALANCER 
BALANCER 
Extent of removal: 
1 
 Balancer drive gear 
2  
 Balancer
Extent of removal Order Part name Q’ty Remarks 
BALANCER REMOVAL 
Preparation for removal Clutc