2016 YAMAHA WR 250F radiator

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Page 18 of 428

YAMAHA WR 250F 2016  Owners Manual DESCRIPTION
1-4
EAS2GB7009
DESCRIPTION
TIP
Designs and specifications of the vehicle are subject to change without notice. Therefore, please 
note that the descriptions in this manual may be different

Page 28 of 428

YAMAHA WR 250F 2016  Owners Manual SPECIAL TOOLS
1-14
Radiator cap tester
90890-01325
Mityvac cooling system tester 
kit
YU-24460-AThis tool is used to check the 
radiator and the radiator cap.
Radiator cap tester adapter
90890-01352
P

Page 55 of 428

YAMAHA WR 250F 2016  Owners Manual ENGINE SPECIFICATIONS
2-2
EAS2GB7062
ENGINE SPECIFICATIONS
Engine
Engine type Liquid cooled 4-stroke, DOHC
Displacement 250 cm
3
Cylinder arrangement Single cylinder
Bore  stroke 77.0  53.6 mm (

Page 64 of 428

YAMAHA WR 250F 2016  Owners Manual ELECTRICAL SPECIFICATIONS
2-11
Mica undercut (depth) 1.50 mm (0.06 in)
Starter relay
Amperage 180.0 A
Coil resistance 4.18–4.62 
Starting circuit cut-off relay
Coil resistance 75.6–92.5 
Hea

Page 66 of 428

YAMAHA WR 250F 2016  Owners Manual TIGHTENING TORQUES
2-13
EAS2GB7066ENGINE TIGHTENING TORQUES
TIP
- marked portion shall be checked for torque tightening after break-in or before each race.
ITEMThread 
sizeQ’ty TIGHTENING TORQUES Re

Page 71 of 428

YAMAHA WR 250F 2016  Owners Manual TIGHTENING TORQUES
2-18
Drive chain tensioner bolt (lower 
side)M8 1 16 Nm (1.6 m·kgf, 12 ft·lbf)
Drive chain support bolt M6 1 7 Nm (0.7 m·kgf, 5.1 ft·lbf)
Drive chain support nut M6 2 7 Nm (0.7

Page 85 of 428

YAMAHA WR 250F 2016  Owners Manual CABLE ROUTING DIAGRAM
2-32
1. Clutch cable
2. Throttle cable (return)
3. Throttle cable (pull)
4. Engine stop switch lead
5. Coupler for connecting optional part
6. Engine stop switch coupler
7. Recti

Page 87 of 428

YAMAHA WR 250F 2016  Owners Manual CABLE ROUTING DIAGRAM
2-34
1. Clamp
2. Cylinder head breather hose
3. Throttle position sensor lead
4. Joint coupler
5. Intake air temperature sensor coupler
6. Intake air pressure sensor lead
7. Wire
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