Yamaha YZ250F(E), Owner'S Service Manual

Page: 252 / 356

AC MAGNETO
5-59
EAS1SM1273
REMOVING THE AC MAGNETO
1. Remove:
• Nut (rotor) “1”
• Washers
2. Remove:
• Rotor “1”
Use the rotor puller “2” to remove the rotor.
• Woodruff key
EAS1SM1274 CHECKING THE AC MAGNETO
1. Check:
• Rotor inner surface “a”
• Stator outer surface “b”
Damage

Inspect the crankshaft runout
and crankshaft bearing.
EAS1SM1275
CHECKING THE WOODRUFF KEY
1. Check:
• Woodruff key “1”
Damage

Replace.
EAS1SM1276 INSTALLING THE AC MAGNETO
1. Install:
• Stator “1”
• Screw (stator) “2”
• Crankshaft position sensor “3”
• Bolt (crankshaft position sensor) “4”
• Holder “5”
• Bolt (holder) “6”
TIP
• Apply the sealant to the grommet of the AC
magneto lead.
• Tighten the stator screws using the T25 bit.
• Pass the AC magneto lead “a” through the
crankcase cover side.
Rotor puller
90890-04151
YM-04151
1
a
b
Screw (stator)
8 Nm (0.8 m·kgf, 5.8ft·lbf)
LOCTITE®
Bolt (crankshaft position sensor)
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
LOCTITE®
Holder
8 Nm (0.8 m·kgf, 5.8 ft·lbf)
LOCTITE®
Three Bond No.1215®
90890-85505
T
R
.
.
T
R
.
.
2
6
5
4
3
4
a
1
LT
LT