2002 YAMAHA WR 400F Owners Manual

Page 337 of 776

YAMAHA WR 400F 2002  Owners Manual INSP
ADJ
PARTIE ELECTRIQUE
CONTROLE DE LA BOUGIE
1. Déposer:
Bougie
2. Contrôler:
Electrode 1 
Usure/endommagement → 
Changer.
Couleur de l’isolateur 2 
Une teinte légèrement brunâtre
corr

Page 338 of 776

YAMAHA WR 400F 2002  Owners Manual 3 - 49
INSP
ADJ
IGNITION TIMING CHECK
IGNITION TIMING CHECK
1. Remove:
Timing plug 1 
2. Attach:
Timing light 
Inductive tachometer 
To the spark plug lead. 
3. Check:
Ignition timing
Timing light

Page 339 of 776

YAMAHA WR 400F 2002  Owners Manual INSP
ADJ
CONTROLE DE L’AVANCE A 
L’ALLUMAGE
1. Déposer:
Bouchon de distribution 1 
2. Attacher:
Lampe stroboscopique 
Compte-tours inductif 
Au fil de la bougie. 
3. Contrôler:
Avance à l

Page 340 of 776

YAMAHA WR 400F 2002  Owners Manual 3 - 50
INSP
ADJ
REPLACING THE HEADLIGHT BULBS
REPLACING THE HEADLIGHT BULBS
1. Remove:
Headlight
Refer to “SEAT, FUEL TANK AND
SIDE COVERS” section in the CHAP-
TER 4.
2. Remove:
Headlight bulb

Page 341 of 776

YAMAHA WR 400F 2002  Owners Manual INSP
ADJ
REMPLACER LES AMPOULES DU 
PHARE 
1. Déposer:
Phare
Se référer à la section “SELLE,
RESERVOIR A ESSENCE ET
CACHES LATERAUX” du
CHAPITRE 4.
2. Déposer:
Cache de fixation d’ampoule

Page 342 of 776

YAMAHA WR 400F 2002  Owners Manual 3 - 51
INSP
ADJ
ADJUSTING THE HEADLIGHT BEAMS
ADJUSTING THE HEADLIGHT BEAMS
1. Adjust:
Headlight beam (vertically)
Adjusting steps:
Turn the adjusting screw 1 in direction a
or b.
Direction a  Headl

Page 343 of 776

YAMAHA WR 400F 2002  Owners Manual INSP
ADJ
SCHEINWERFER EINSTELLEN
1. Einstellen:
Scheinwerferstellung (ver-
tikal)
Arbeitsschritte:
Die Einstellschraube 1 nach a
oder b drehen.
Nach aLichtkegel nach 
oben.
Nach bLichtkegel nach 
un

Page 344 of 776

YAMAHA WR 400F 2002  Owners Manual ENG
4 - 1
EC400000
ENGINE
EC4R0000
SEAT, FUEL TANK AND SIDE COVERS
Extent of removal:1 Seat removal2 Fuel tank removal
3 Side covers removal4 Headlight removal
Extent of removal Order Part name Q’ty