2005 YAMAHA YZ250LC oil

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Page 205 of 596

YAMAHA YZ250LC 2005  Owners Manual 3-34
CONTROLE DE PRESSION DES PNEUS/VERIFICATION ET SERRAGE DES
RAYONS/VERIFICATION DE LA ROUE
PRÜFUNG DES REIFENDRUCKS/INSPEKTION UND FESTZIEHEN DER 
SPEICHEN/INSPEKTION DES RADES
CONTROLLO DELLA PR

Page 210 of 596

YAMAHA YZ250LC 2005  Owners Manual 3-37
LUBRICATION
INSP
ADJ
EC36a042
LUBRICATION
To ensure smooth operation of all components,
lubricate your machine during setup, after break-
in, and after every race.
1All control cable
2Clutch leve

Page 241 of 596

YAMAHA YZ250LC 2005  Owners Manual 4-12
CARBURATEUR ET SOUPAPE FLEXIBLE
VERGASER UND ZUNGENVENTIL
CARBURATORE E VALVOLA A LAMELLAENG
9Hauteur de la butée de soupape
b
Hors spécification Régler/
Changer la butée de clapet.9Altezza

Page 242 of 596

YAMAHA YZ250LC 2005  Owners Manual 2. Install:
9Gasket (reed valve) 1 
9Plate (reed valve) 2 
9Reed valve assembly 3
9Reed valve spacer 4
NOTE:
Install the reed valve spacer with its chamfered
side ato the right.
4-13
ENGCARBURETOR AND

Page 259 of 596

YAMAHA YZ250LC 2005  Owners Manual 4-21
CULASSE, CYLINDRE ET PISTON
ZYLINDERKOPF, ZYLINDER UND KOLBEN
TESTA CILINDRO, CILINDRO E PISTONEENG
VERIFICATION
Culasse
1. Éliminer:
9Depôts de carbone
Utiliser le grattoir arrondi 1.
N.B.:
Pr

Page 270 of 596

YAMAHA YZ250LC 2005  Owners Manual 4-27
ENGCYLINDER HEAD, CYLINDER AND PISTON
EC475000
ASSEMBLY AND INSTALLATION
EC475193
Power valve
1. Install:
9Power valve 1 1
9Valve holder 2 2
9Bolt (valve holder 2) 3
NOTE:
9Install the power valv

Page 272 of 596

YAMAHA YZ250LC 2005  Owners Manual 4-28
CYLINDER HEAD, CYLINDER AND PISTONENG
4. Install:
9Spring 1 1
9Link lever 2
9Pulley 3
9Spring 2 4
9Plain washer 5
9Valve shaft 6
NOTE:
9Install the spring 1 to the link lever, and then to
the cyl

Page 274 of 596

YAMAHA YZ250LC 2005  Owners Manual 4-29
CYLINDER HEAD, CYLINDER AND PISTONENG
7. Install:
9O-ring 1
9Side holder 2
9Screw (side holder) 3
9YPVS breather hose 4
NOTE:
9Apply the lithium soap base grease on the O-
rings.
9Install the sid