2014 YAMAHA WR 250F oil pressure

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Page 31 of 230

YAMAHA WR 250F 2014  Owners Manual 1-21
CLEANING AND STORAGE
CLEANING AND STORAGE
CLEANING
Frequent cleaning of your machine 
will enhance its appearance, maintain 
good overall performance, and ex-
tend the life of many components.
1.

Page 39 of 230

YAMAHA WR 250F 2014  Owners Manual 2-8
MAINTENANCE SPECIFICATIONS
CHASSISCarburetor: ZA, AUS, NZ EUROPE
Type/manufacturer FCR-MX37/KEIHIN←----
I. D. mark 5UME E0 5UML L0 ----
Main jet (M.J) #170 #160 ----
Main air jet (M.A.J) #115←

Page 40 of 230

YAMAHA WR 250F 2014  Owners Manual 2-9
MAINTENANCE SPECIFICATIONS
Front suspension:
Front fork travel 300.0 mm (11.81 in) ----
Fork spring free length 460.0 mm (18.11 in) 455.0 mm 
(17.91  in)
Spring rate, STD K = 4.40 N/mm (0.45 kg/mm

Page 43 of 230

YAMAHA WR 250F 2014  Owners Manual 2-12
TIGHTENING TORQUES
TIGHTENING TORQUES
ENGINE
△- marked portion shall be checked for torque tightening after break-in or before each race.
ItemThread 
sizeQty Tightening torque Remarks
Spark pl

Page 63 of 230

YAMAHA WR 250F 2014  Owners Manual 3-4
MAINTENANCE INTERVALS FOR COMPETITION USE
STEERING HEAD
Inspect free play and retighten●●
Clean and lube●Lithium base grease
Replace bearing●
TIRE, WHEELS
Inspect air pressure, wheel run-

Page 64 of 230

YAMAHA WR 250F 2014  Owners Manual 3-5
PRE-OPERATION INSPECTION AND MAINTENANCE
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation or practice, make sure the machine is in good operating condition.
Before usi

Page 69 of 230

YAMAHA WR 250F 2014  Owners Manual 3-10
ENGINE
• Do not mix more than one type of 
ethylene glycol antifreeze con-
taining corrosion inhibitors for 
aluminum engine.
• Do not use water containing im-
purities or oil.
Handling notes

Page 72 of 230

YAMAHA WR 250F 2014  Owners Manual 3-13
ENGINE
5. Remove:
• Oil hose clamp "1"
• Bolt (oil hose)
• Oil hose "2"
• Oil strainer "3"
6. Inspect:
• Oil strainer
Clogged→Blow.
7. If the oil filter is to be replaced dur-
ing thi
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