YAMAHA YZ250LC 2007 Manuale duso (in Italian)

YAMAHA YZ250LC 2007 Manuale duso (in Italian) YZ250LC 2007 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/53963/w960_53963-0.png YAMAHA YZ250LC 2007 Manuale duso (in Italian)
Trending: radiator, check engine, dimensions, oil type, clock, ECO mode, check engine light

Page 261 of 596

YAMAHA YZ250LC 2007  Manuale duso (in Italian) INSPEKTION
Zylinderkopf
1. Entfernen:
9Ölkohleablagerungen 
Einen abgerundeten Schaber
1verwenden.
HINWEIS:
Dabei vorsichtig vorgehen, damit das
Gewinde der Zündkerzenbohrung
nicht beschädigt wird.

Page 262 of 596

YAMAHA YZ250LC 2007  Manuale duso (in Italian) 4-22
ENGCYLINDER HEAD, CYLINDER AND PISTON
EC474201
Cylinder
1. Eliminate:
9Carbon deposits
Use a rounded scraper 1.
NOTE:
Do not use a sharp instrument. Avoid scratching
the aluminum.
2. Inspect:
9Cy

Page 263 of 596

YAMAHA YZ250LC 2007  Manuale duso (in Italian) 4-22
CULASSE, CYLINDRE ET PISTON
ZYLINDERKOPF, ZYLINDER UND KOLBEN
TESTA CILINDRO, CILINDRO E PISTONEENG
Cylindre
1. Éliminer:
9Dépôts du carbone
Utiliser le grattoir arrondi 1.
N.B.:
Eviter d’ut

Page 264 of 596

YAMAHA YZ250LC 2007  Manuale duso (in Italian) 4-23
ENGCYLINDER HEAD, CYLINDER AND PISTON
3. Measure:
9Piston skirt diameter
Use micrometer 1.
Measure the specific distance bfrom the
stepped surface aon inside of the piston.
Out of specification 

Page 265 of 596

YAMAHA YZ250LC 2007  Manuale duso (in Italian) 4-23
CULASSE, CYLINDRE ET PISTON
ZYLINDERKOPF, ZYLINDER UND KOLBEN
TESTA CILINDRO, CILINDRO E PISTONEENG
Axe de piston et coussinet de pied de
bielle
1. Examiner:
9Axe de piston
9Coussinet de pied de

Page 266 of 596

YAMAHA YZ250LC 2007  Manuale duso (in Italian) 4-24
ENGCYLINDER HEAD, CYLINDER AND PISTON
EC474502
Piston ring
1. Install:
9Piston ring
Into the cylinder.
Push the ring with the piston crown.
2. Measure:
9End gap
Use a thickness gauge 1.
Out of li

Page 267 of 596

YAMAHA YZ250LC 2007  Manuale duso (in Italian) 4-24
CULASSE, CYLINDRE ET PISTON
ZYLINDERKOPF, ZYLINDER UND KOLBEN
TESTA CILINDRO, CILINDRO E PISTONEENG
3. Misurare:
9Gioco laterale
Usare uno spessimetro 1.
Fuori limiteSostituire il pisto-
ne e/o

Page 268 of 596

YAMAHA YZ250LC 2007  Manuale duso (in Italian) 4-25
ENGCYLINDER HEAD, CYLINDER AND PISTON
EC474700
Combination of piston and cylinder
1. Check:
9Cylinder mark a
2. Check:
9Piston mark a
Piston clearance:
Standard <Limit>
0.045~0.050 mm  0.1 mm 
(0

Page 269 of 596

YAMAHA YZ250LC 2007  Manuale duso (in Italian) 4-25
CULASSE, CYLINDRE ET PISTON
ZYLINDERKOPF, ZYLINDER UND KOLBEN
TESTA CILINDRO, CILINDRO E PISTONEENG
Kombination von Kolben und 
Zylinder
1. Kontrollieren:
9Zylindermarkierung a
2. Kontrollieren:

Page 270 of 596

YAMAHA YZ250LC 2007  Manuale duso (in Italian) 4-26
ENGCYLINDER HEAD, CYLINDER AND PISTON
EC474841
Power valve
1. Inspect:
9Power valve 1, 2 1
Wear/Damage Replace.
Carbon deposits Remove.
9Valve holder 1 2
9Link lever 3
9Pulley 4
9Valve shaft 5
Trending: dimensions, air bleeding, recommended oil, oil type, sensor, seat adjustment, engine