2016 YAMAHA YZ250F radiator

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Page 18 of 356

YAMAHA YZ250F 2016  Owners Manual DESCRIPTION
1-4
EAS1SM9009
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 356

YAMAHA YZ250F 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 43 of 356

YAMAHA YZ250F 2016  Owners Manual ENGINE SPECIFICATIONS
2-2
EAS1SM9051
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 53 of 356

YAMAHA YZ250F 2016  Owners Manual TIGHTENING TORQUES
2-12
EAS1SM9055ENGINE 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 58 of 356

YAMAHA YZ250F 2016  Owners Manual TIGHTENING TORQUES
2-17
TIP
Lower ring nut
1. First, tighten the lower ring nut approximately 38 Nm (3.8 m·kgf, 27 ft·lbf) by using the steering nut 
wrench, then loosen the lower ring nut one turn.

Page 73 of 356

YAMAHA YZ250F 2016  Owners Manual CABLE ROUTING DIAGRAM
2-32
1. Clutch cable
2. Throttle cable (pull)
3. Throttle cable (return)
4. Cable holder
5. Engine stop switch lead
6. Frame
7. Coupler for connecting optional part
8. Bracket
9.

Page 75 of 356

YAMAHA YZ250F 2016  Owners Manual CABLE ROUTING DIAGRAM
2-34
1. Bracket
2. Condenser
3. Coolant temperature sensor
4. Coupler cover
5. Intake air temperature sensor coupler
6. Intake air temperature sensor coupler
7. Radiator hoses
8.

Page 79 of 356

YAMAHA YZ250F 2016  Owners Manual CABLE ROUTING DIAGRAM
2-38
1. Main harness
2. Radiator
3. Throttle position sensor lead
4. Joint coupler
5. Intake air temperature sensor lead
6. Intake air pressure sensor lead
7. Frame
8. Fuel hose
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