2007 YAMAHA WR 250F checking oil

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Page 36 of 912

YAMAHA WR 250F 2007  Notices Demploi (in French) 1 - 11
GEN
INFO
SPECIAL TOOLS
SPECIAL TOOLS
The proper special tools are necessary for complete and accurate tune-up and assembly. Using the correct special tool
will help prevent damage caused by the

Page 37 of 912

YAMAHA WR 250F 2007  Notices Demploi (in French) 1 - 12
GEN
INFO
SPECIAL TOOLS
YS-1880-A, 90890-01701 Sheave holder
This tool is used for when loosening or tightening the 
flywheel magneto securing nut.
YU-3112-C, 90890-03112 Pocket tester
Use this

Page 270 of 912

YAMAHA WR 250F 2007  Notices Demploi (in French) 3 - 59
INSP
ADJ
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 304 of 912

YAMAHA WR 250F 2007  Notices Demploi (in French) 3 - 93
INSP
ADJ
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 466 of 912

YAMAHA WR 250F 2007  Notices Demploi (in French) 5 - 59
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 746 of 912

YAMAHA WR 250F 2007  Notices Demploi (in French) 6 - 83
CHASFRONT FORK
20. Measure:
Oil level (left and right) 
a 
Out of specification 
→ Adjust.
NOTE:Be sure to install the spring guide 
2
when checking the oil level.
WARNING
Never fail to make

Page 826 of 912

YAMAHA WR 250F 2007  Notices Demploi (in French) 7 - 5
–+ELECIGNITION SYSTEM
EC620000
IGNITION SYSTEM
INSPECTION STEPS
Use the following steps for checking the possibility of the malfunctioning engine being attributable to ignition system failure

Page 870 of 912

YAMAHA WR 250F 2007  Notices Demploi (in French) 7 - 49
–+ELECCHARGING SYSTEM
EC624000COUPLERS AND LEADS 
CONNECTION INSPECTION
1. Check:
•Couplers and leads connec-
tion
Rust/dust/looseness/short-cir-
cuit 
→ Repair or replace.
CHARGING VOLTA
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