check oil YAMAHA WR 250F 2003 User Guide

YAMAHA WR 250F 2003 User Guide WR 250F 2003 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/52337/w960_52337-0.png YAMAHA WR 250F 2003 User Guide

Page 236 of 860

YAMAHA WR 250F 2003 User Guide 3 - 45
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8. Install:
Copper washer 
1 
Oil strainer (frame) 
2 
Oil hose 
3 
Bolt (oil hose) 
4 
Oil hose clamp 
5 
Lower engine bracket
9. Install:
Copper washer
Oil filter element dra

Page 238 of 860

YAMAHA WR 250F 2003 User Guide 3 - 47
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OIL PRESSURE INSPECTION
1. Check:
Oil pressure
Checking steps:
Slightly loosen the oil pressure
check bolt 
1.
Start the engine and keep it
idling until oil starts to seep from
the

Page 270 of 860

YAMAHA WR 250F 2003 User Guide 3 - 79
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DRIVE CHAIN INSPECTION
1. Remove:
Drive chain 
1 
NOTE:Remove the drive chain using a drive
chain cutter 
2.
2. Clean:
Drive chain
Brush off as much dirt as pos-
sible. Then clean th

Page 272 of 860

YAMAHA WR 250F 2003 User Guide 3 - 81
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6. Install:
Chain joint 
1 
O-ring 
2 
Drive chain 
3 
NOTE:When installing the drive chain, apply
the lithium soap base grease on the
chain joint and O-rings.
7. Install:
Link pla

Page 290 of 860

YAMAHA WR 250F 2003 User Guide 3 - 99
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EC36Q000TIRE PRESSURE CHECK
1. Measure:
Tire pressure
Out of specification 
→ Adjust.
NOTE:Check the tire while it is cold.
Loose bead stoppers allow the tire
to slip off its posi

Page 300 of 860

YAMAHA WR 250F 2003 User Guide 3 - 109
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2. Attach:
Timing light 
Inductive tachometer 
To the ignition coil lead
(orange lead 
1).
Timing light:
YM-33277-A/
90890-03141
Inductive tachometer:
YU-8036-B
Engine tachometer:
9

Page 302 of 860

YAMAHA WR 250F 2003 User Guide 3 - 111
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BATTERY INSPECTION AND 
CHARGING
WARNING
Batteries generate explosive
hydrogen gas and contain electro-
lyte which is made of poisonous
and highly caustic sulfuric acid. 
Therefore, a

Page 318 of 860

YAMAHA WR 250F 2003 User Guide 3 - 127
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6. Install:
Battery
Battery band
7. Connect:
Battery leads
(to the battery terminals)
CAUTION:
First, connect the positive lead 1,
then the negative lead 2.
8. Check:
Battery term

Page 390 of 860

YAMAHA WR 250F 2003 User Guide 4 - 65
ENGCAMSHAFTS
Decompression system
1. Check:
Decompression system
Checking steps:
Check that the decompression
mechanism cam 
1 moves
smoothly.
Check that the decompression
mechanism cam leve

Page 488 of 860

YAMAHA WR 250F 2003 User Guide 4 - 163
ENGOIL PUMP
INSPECTION
Oil pump
1. Inspect:
Oil pump drive gear 
1 
Oil pump drive shaft 
2 
Rotor housing 
3 
Oil pump cover 
4 
Cracks/wear/damage 
→ 
Replace.1
32
4
2. Measure:
Tip c
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