checking oil YAMAHA WR 250F 2003 Betriebsanleitungen (in German)

YAMAHA WR 250F 2003 Betriebsanleitungen (in German) WR 250F 2003 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/52337/w960_52337-0.png YAMAHA WR 250F 2003 Betriebsanleitungen (in German)

Page 36 of 860

YAMAHA WR 250F 2003  Betriebsanleitungen (in German) 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 860

YAMAHA WR 250F 2003  Betriebsanleitungen (in German) 1 - 12
GEN
INFO
SPECIAL TOOLS
YU-3112-C, 90890-03112 Pocket tester
Use this tool to inspect the coil resistance, output 
voltage and amperage.
YU-8036-B
90890-03113Inductive tachometer
Engine tachomet

Page 238 of 860

YAMAHA WR 250F 2003  Betriebsanleitungen (in German) 3 - 47
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 272 of 860

YAMAHA WR 250F 2003  Betriebsanleitungen (in German) 3 - 81
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 300 of 860

YAMAHA WR 250F 2003  Betriebsanleitungen (in German) 3 - 109
INSP
ADJ
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 318 of 860

YAMAHA WR 250F 2003  Betriebsanleitungen (in German) 3 - 127
INSP
ADJ
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  Betriebsanleitungen (in German) 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 660 of 860

YAMAHA WR 250F 2003  Betriebsanleitungen (in German) 5 - 83
CHASFRONT FORK
20. Measure:
Oil level (left and right) 
a 
Out of specification 
→ Adjust.
* For EUROPE
** For AUS, NZ and ZA
NOTE:Be sure to install the spring guide 
2
when checking the oi

Page 741 of 860

YAMAHA WR 250F 2003  Betriebsanleitungen (in German) 6 - 8
–+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 784 of 860

YAMAHA WR 250F 2003  Betriebsanleitungen (in German) 6 - 51
–+ELECCHARGING SYSTEM
EC624000COUPLERS AND LEADS 
CONNECTION INSPECTION
1. Check:
Couplers and leads connec-
tion
Rust/dust/looseness/short-cir-
cuit 
→ Repair or replace.
CHARGING VOLTAGE