2006 YAMAHA WR 250F oil

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Page 246 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 3 - 39
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ADJ
ENGINE OIL LEVEL INSPECTION
1. Start the engine, warm it up for
several minutes, and then turn
off the engine and wait for five
minutes.
2. Place the machine on a level
place and hold

Page 248 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 3 - 41
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(Except for USA and CDN)
CAUTION:
Do not add any chemical addi-
tives or use oils with a grade of
CD a or higher.
Do not use oils labeled
“ENERGY CONSERVING II” b
or higher. Engi

Page 250 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 3 - 43
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ADJ
4. Remove:
Oil tank cap 
1 
Oil filler cap 
2 
Frame oil drain bolt 
3 
Crankcase oil drain bolt 
4 
Oil filter element drain bolt 
5 
Drain the crankcase and oil
tank (frame) of

Page 252 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 3 - 45
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ADJ
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 254 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 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 262 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 3 - 55
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EXAMPLE:
Installed pad number = 148
Rounded off value = 150
NOTE:Pads can only be selected in
0.05 mm increments.
Locate the rounded-off value
and the measured valve clear-
ance in th

Page 286 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 3 - 79
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DRIVE CHAIN INSPECTION
1. Measure:
Drive chain length (15 links) 
a 
Out of specification 
→ 
Replace.
NOTE:While measuring the drive chain
length, push down on the drive
chain to

Page 288 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 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