2014 YAMAHA YZ250F drain bolt

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Page 18 of 356

YAMAHA YZ250F 2014  Owners Manual DESCRIPTION
1-4
EAS1SM1009
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 38 of 356

YAMAHA YZ250F 2014  Owners Manual MAINTENANCE AFTER BREAK-IN
1-24
EAS1SM1046
MAINTENANCE AFTER BREAK-IN
After a break-in, perform careful maintenance 
to get ready for the next practice or race.
Refer to “PRE-OPERATION INSPECTION 
A

Page 56 of 356

YAMAHA YZ250F 2014  Owners Manual TIGHTENING TORQUES
2-13
EAS1SM1057ENGINE 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 57 of 356

YAMAHA YZ250F 2014  Owners Manual TIGHTENING TORQUES
2-14
Air filter guide holder screw
M5 8 2.5 Nm (0.25 m·kgf, 1.8 ft·lbf)
Air filter case cap screw
M5 1 2.5 Nm (0.25 m·kgf, 1.8 ft·lbf)
Starter knob/Idle screw
M12 1 2.1 Nm (0.21

Page 94 of 356

YAMAHA YZ250F 2014  Owners Manual ENGINE
3-8
EAS1SM1069
ENGINE
EAS1SM1070CHECKING THE COOLANT LEVELEWA1DX1003
WARNING
If coolant seems hot, do not remove the ra-
diator cap.
1. Stand the vehicle upright on a level surface.
2. Remove:

Page 95 of 356

YAMAHA YZ250F 2014  Owners Manual ENGINE
3-9
5. Install:
• Copper washers 
• Coolant drain bolt
6. Pour coolant.
EWA13040
WARNING
• If coolant splashes in your eyes, thorough-
ly wash them with water and consult a 
doctor.
• I

Page 101 of 356

YAMAHA YZ250F 2014  Owners Manual ENGINE
3-15
EAS1SM1086CHANGING THE ENGINE OIL
Stand the vehicle upright on a level surface.
1. Start the engine, warm this up for several 
minutes, and then stop the engine and wait 
about 5 minutes.

Page 102 of 356

YAMAHA YZ250F 2014  Owners Manual ENGINE
3-16
7. Pour the specified amount of engine oil into 
the oil filler cap hole.
8. Install:
• Oil filler cap
9. Check:
• Oil level
Refer to “CHECKING THE ENGINE OIL 
LEVEL” on page 3-14.
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