2015 YAMAHA WR 250F check engine

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Page 107 of 430

YAMAHA WR 250F 2015  Owners Manual PERIODIC MAINTENANCE
3-3
TIP
• The air filter needs more frequent service if you are riding in unusually wet or dusty areas.
• Hydraulic brake service
• After disassembling the brake master cyli

Page 108 of 430

YAMAHA WR 250F 2015  Owners Manual PERIODIC MAINTENANCE
3-4
EAS2GB2080MAINTENANCE INTERVALS FOR COMPETITION USE
TIP
• The following schedule is intended as a general guide to maintenance and lubrication. Bear in mind 
that such facto

Page 110 of 430

YAMAHA WR 250F 2015  Owners Manual PERIODIC MAINTENANCE
3-6
COOLING SYSTEM
Check coolant lev-
el and leakage
Check radiator cap 
operation
Replace coolant Every two years
Inspect hoses
OUTSIDE NUTS 
AND BOLTS
RetightenRefer to “START

Page 113 of 430

YAMAHA WR 250F 2015  Owners Manual PRE-OPERATION INSPECTION AND MAINTENANCE
3-9
EAS2GB2081
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation, practice or a race, make sure the machine is in good operating 
c

Page 114 of 430

YAMAHA WR 250F 2015  Owners Manual ENGINE
3-10
EAS2GB2083
ENGINE
EAS2GB2084CHECKING THE COOLANT LEVELEWA
WARNING
If coolant seems hot, do not remove the ra-
diator cap.
1. Stand the vehicle upright on a level surface.
2. Remove:
• Ra

Page 115 of 430

YAMAHA WR 250F 2015  Owners Manual ENGINE
3-11
5. Install:
• Copper washer 
• Coolant drain bolt
6. Pour coolant.
EWA
WARNING
• If coolant splashes in your eyes, thorough-
ly wash them with water and consult a 
doctor.
• If coo

Page 116 of 430

YAMAHA WR 250F 2015  Owners Manual ENGINE
3-12
EAS2GB2089CHECKING THE COOLANT CIRCULATORY 
SYSTEM FOR LEAKS
1. Check:
• Coolant level
2. Install:
• Radiator cap tester “1”
• Adapter “2”
3. Activate the tester to apply the

Page 117 of 430

YAMAHA WR 250F 2015  Owners Manual ENGINE
3-13
c. Turn the adjuster “2” in direction “a” or “b” 
until the specified clutch lever free play is ob-
tained.
d. Tighten the locknut “1”.
e. Return the clutch cable cover to
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