2001 YAMAHA WR 426F compression ratio

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Page 52 of 762

YAMAHA WR 426F 2001  Owners Manual 1 - 11
GEN
INFO
CONTROL FUNCTIONS
DECOMPRESSION LEVER
CAUTION:
Never use the decompression lever after
the engine is started. The engine may be
damaged if you use the decompression
lever while it is r

Page 53 of 762

YAMAHA WR 426F 2001  Owners Manual GEN
INFO
FONCTIONS DES COMMANDES
ARMATUREN UND DEREN FUNKTION
FUNCIONES DE CONTROL
DEKOMPRESSIONSHEBEL
ACHTUNG:
Den Dekompressionshebel unter
keinen Umständen bei laufendem
Motor betätigen. Dies kan

Page 58 of 762

YAMAHA WR 426F 2001  Owners Manual 1 - 14
GEN
INFO
STARTING AND BREAK-IN
STARTING AND BREAK-IN
WARNING
Never start or run the engine in a closed
area. The exhaust fumes are poisonous;
they can cause loss of consciousness and
death in a

Page 59 of 762

YAMAHA WR 426F 2001  Owners Manual GEN
INFO
MISE EN MARCHE ET RODAGE
ANLASSEN UND EINFAHREN
ARRANQUE Y RODAJE
ANLASSEN UND EINFAH-
REN
WARNUNG
Den Motor keinesfalls in geschlos-
senen Räumen anlassen und be-
treiben. Abgase sind äuß

Page 61 of 762

YAMAHA WR 426F 2001  Owners Manual GEN
INFO
MISE EN MARCHE ET RODAGE
ANLASSEN UND EINFAHREN
ARRANQUE Y RODAJE
6. Den Dekompressionshebel
anziehen und den Kickstarter-
hebel um 10–20˚ heruntertre-
ten.
7. Zuerst den Dekompressions-
h

Page 62 of 762

YAMAHA WR 426F 2001  Owners Manual 1 - 16
GEN
INFO
STARTING AND BREAK-IN
STARTING A WARM ENGINE
Do not operate the cold starter knob and throt-
tle. Open the hot starter knob (red) and start
the engine by kicking the kick starter force

Page 74 of 762

YAMAHA WR 426F 2001  Owners Manual  
2 - 1
SPEC
 
GENERAL SPECIFICATIONS (WR426F) 
EC200000 
SPECIFICATIONS 
EC211000 
GENERAL SPECIFICATIONS (WR426F) 
Model name: WR426FN (USA)
WR426F (EUROPE)
WR426F(N) (CDN, AUS, NZ, ZA)
Model code n

Page 91 of 762

YAMAHA WR 426F 2001  Owners Manual 2 - 18
SPECGENERAL SPECIFICATIONS (WR400F)
EC211000
GENERAL SPECIFICATIONS (WR400F)
Model name: WR400F (EUROPE)
WR400FN (AUS)
Model code number: 5GS9
Dimensions:
Overall length 2,171 mm (85.5 in)
Over
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