2005 YAMAHA WR 250F clutch

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Page 510 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 185
ENGAC MAGNETO AND STARTER CLUTCH
AC MAGNETO AND STARTER CLUTCH
Extent of removal:
1 Starter clutch/wheel gear removal
2 Rotor removal
3 Pickup coil/stator removal
Extent of removal Order Part

Page 514 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 189
ENGAC MAGNETO AND STARTER CLUTCH
NOTE:Tighten the rotor nut to 65 Nm (6.5 m  kg, 47 ft  lb), loosen and retighten the rotor nut to 65 Nm (6.5 m  kg, 47 ft  lb).
Extent of removal Order Par

Page 518 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 193
ENGAC MAGNETO AND STARTER CLUTCH
EC4L3000REMOVAL POINTS
Rotor
1. Remove:
Nut (rotor) 
1 
Washer
Use the sheave holder 
2.
Sheave holder:
YS-1880-A/
90890-01701
2
1
2. Remove:
Rotor 
1 
Use

Page 520 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 195
ENGAC MAGNETO AND STARTER CLUTCH
EC4L4000INSPECTION
AC magneto
1. Inspect:
Rotor inner surface 
a 
Stator outer surface 
b 
Damage 
→ Inspect the crank-
shaft runout and crankshaft
bearing

Page 522 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 197
ENGAC MAGNETO AND STARTER CLUTCH
3. Check:
Starter clutch operation
Install the starter clutch drive
gear 
1 onto the starter clutch
2 and hold the starter clutch.
When turning the starter

Page 524 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 199
ENGAC MAGNETO AND STARTER CLUTCH
2. Install:
Holder 
1 
Bolt 
2 
CAUTION:
Pass the pickup coil lead and
charging coil lead under the
holder while taking care not to
allow these leads to get

Page 526 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 201
ENGAC MAGNETO AND STARTER CLUTCH
6. Install:
Starter clutch 
1 
To rotor 
2.
NOTE:Install the starter clutch with its
plate side upward.
While installing the starter clutch,
push in the pro

Page 528 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 203
ENGAC MAGNETO AND STARTER CLUTCH
9. Install:
Washer (rotor)
Nut (rotor) 
1 
Use the sheave holder 
2.
NOTE:Tighten the rotor nut to 65 Nm
(6.5 mkg, 47 ftlb), loosen and
retighten the rotor
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