YAMAHA YZ250LC 2007 Owners Manual

YAMAHA YZ250LC 2007 Owners Manual YZ250LC 2007 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/53963/w960_53963-0.png YAMAHA YZ250LC 2007 Owners Manual
Trending: fuel cap, steering, lug pattern, ECU, AUX, fuel pump, lock

Page 551 of 596

YAMAHA YZ250LC 2007  Owners Manual 7-5
REGLAGE
EINSTELLUNG
REGISTRAZIONETUN
1. Trop riche aux régimes intermé-
diaires
Le fonctionnement du moteur est
irrégulier et le moteur ne prend pas
régulièrement de vitesse. Dans ce
cas, rem

Page 552 of 596

YAMAHA YZ250LC 2007  Owners Manual 7-6
SETTINGTUN
EC719081
Jet needle adjustment
On the carburetors used in the YZ250, the main
nozzle is press-fitted, so it can not be replaced.
Therefore, carburetor setting requires the change
of the

Page 553 of 596

YAMAHA YZ250LC 2007  Owners Manual 7-6
REGLAGE
EINSTELLUNG
REGISTRAZIONETUN
Düsennadel-Einstellung
An den beim Modell YZ250 verwende-
ten Vergasern ist der Hauptzerstäuber
eingepresst, so dass er nicht ausge-
tauscht werden kann. Die

Page 554 of 596

YAMAHA YZ250LC 2007  Owners Manual 7-7
SETTINGTUN
EC71B011
Relationship with throttle opening
The flow of the fuel through the carburetor main
system is controlled by the main jet and then, it is
further regulated by the area between t

Page 555 of 596

YAMAHA YZ250LC 2007  Owners Manual 7-7
REGLAGE
EINSTELLUNG
REGISTRAZIONETUN
Zusammenhang mit der Drosselöff-
nung
Die durch das Vergaser-Hauptsystem
strömende Kraftstoffmenge wird durch
die Hauptdüse geregelt und danach
weiter durch

Page 556 of 596

YAMAHA YZ250LC 2007  Owners Manual 7-8
SETTINGTUN
EC71Q000
Carburetor setting parts
Part name Size Part number
Main jet 1 1
Rich #190 4MX-14943-45
#188 4MX-14943-95
#185 4MX-14943-44
#182 4MX-14943-94
*(STD) #180 4MX-14943-43
(STD) #17

Page 557 of 596

YAMAHA YZ250LC 2007  Owners Manual 7-8
REGLAGE
EINSTELLUNG
REGISTRAZIONETUN
Vergaser-Einstellteile
*Für EUROPA
*Per EUROPA Pièces de réglage du carburateur
IC71Q000
Parti di regolazione del carburatore
Nom de pièce TailleNuméro 
d

Page 558 of 596

YAMAHA YZ250LC 2007  Owners Manual 7-9
SETTINGTUN
EC71D021
Examples of carburetor setting depending on symptom
Symptom Setting Checking
At full throttle Increase main jet calibration No. Discoloration of spark plug 
Hard breathing (Gr

Page 559 of 596

YAMAHA YZ250LC 2007  Owners Manual 7-10
SETTINGTUN
Symptom Setting Checking
0~1/4 throttle Use jet needle having a smaller  Number of turns-back 
Hard breathing diameter. Correct properly
Speed down Overflow from carburetor
0~1/4 thro

Page 560 of 596

YAMAHA YZ250LC 2007  Owners Manual 7-9
REGLAGETUN
Conditions de la route et exemples de réglages de carburateur
Exemples de réglages de carburateur en fonction des symptômes
Symptômes
A pleins gaz
Attaque difficile
Bruit de cisaill
Trending: steering wheel, weight, tire size, fuel cap, suspension, clock, wiring diagram