weight YAMAHA WR 250F 2007 Manuale duso (in Italian)

YAMAHA WR 250F 2007 Manuale duso (in Italian) WR 250F 2007 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/52333/w960_52333-0.png YAMAHA WR 250F 2007 Manuale duso (in Italian)

Page 10 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) EC050000
TO THE NEW OWNER
This manual will provide you with a
good basic understanding of fea-
tures, operation, and basic mainte-
nance and inspection items of this
machine. Please read this manual
c

Page 16 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) ILLUSTRATED SYMBOLS 
(Refer to the illustration)
Illustrated symbols 1 to 7 are
designed as thumb tabs to indicate
the chapter’s number and content.
1General information
2Specifications
3Regular ins

Page 32 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 1 - 7
GEN
INFOIMPORTANT INFORMATION
EC133000GASKETS, OIL SEALS AND O-
RINGS
1. All gaskets, oil seals, and O-
rings should be replaced when
an engine is overhauled. All gas-
ket surfaces, oil seal lip

Page 94 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) GENERAL SPECIFICATIONS
2 - 1
SPEC
EC200000
SPECIFICATIONS
EC211000
GENERAL SPECIFICATIONS
Model name: WR250FW (USA, CDN, AUS, NZ)
WR250F (EUROPE, ZA)
Model code number: 5UME (USA)
5UMF (EUROPE)
5UMG (

Page 103 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) MAINTENANCE SPECIFICATIONS
2 - 10
SPEC
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Spark plug M10S × 1.0 1 13 1.3 9.4
Camshaft cap M6 × 1.0 10 10 1.0 7.2
Cylinder head b

Page 112 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 2 - 19
GENERAL TORQUE SPECIFICATIONS/
DEFINITION OF UNITS
SPEC
EC220001
GENERAL TORQUE SPECIFICATIONS
This chart specifies torque for standard fasten-
ers with standard I.S.O. pitch threads. Torque
sp

Page 330 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 3 - 119
INSP
ADJ
LUBRIFICATION
Pour assurer le bon fonctionnement de
tous les organes, lubrifier la moto avant
la première utilisation, après le rodage,
ainsi qu’après chaque utilisation.
1
Tous

Page 430 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 5 - 23
ENGCARBURETOR
EC464301Throttle valve
1. Check:
Free movement
Stick 
→ Repair or replace.
NOTE:Insert the throttle valve 
1 into the
carburetor body, and check for free
movement.
EC464401Jet

Page 556 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 5 - 149
ENGBALANCER
REMOVAL POINTS
Balancer shaft drive gear and 
balancer shaft driven gear
1. Straighten the lock washer tab.
2. Loosen:
Nut (primary drive gear) 
1 
Nut 
(balancer shaft driven ge

Page 558 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 5 - 151
ENGBALANCER
ASSEMBLY AND INSTALLATION
Balancer shaft, balancer shaft 
drive gear and balancer shaft 
driven gear
1. Install:
Balancer shaft 
1 
NOTE:Apply the engine oil on the bear-
ing.
W