Yamaha YZ450FA 2011 Owner's Service Manual page 174

REMOVING THE ROTOR
1. Remove:
• Nut (rotor) "1"
• Washer
2. Remove:
• Rotor "1"
Use the rotor puller 2.
Rotor puller:
YM-04151/90890-04151
CHECKING THE AC MAGNETO
1. Inspect:
• Rotor inner surface "a"
• Stator outer surface "b"
Damage→Inspect the crankshaft runout and
crankshaft bearing.
CHECKING THE WOODRUFF KEY
1. Inspect:
• Woodruff key "1"
Damage → Replace.
INSTALLING THE AC MAGNETO
1. Install:
• Stator "1"
• Screw (stator) "2"
Screw (stator):
8 Nm (0.8 m•kg, 5.8ft•lb)
• Crankshaft position sensor "3"
• Holder "4"
• Bolt (crankshaft position sensor) "5"
Bolt (crankshaft position sensor):
10 Nm (1.0 m•kg, 7.2 ft•lb)
• Apply the sealant on the grommet of the AC
magneto lead.
• Tighten the screws using the T30 bit.
• Pass the crankshaft position sensor lead "a"
this side of the stator lead "b".
•Install the holder so that the projection "c" on
the holder contacts the stopper.
YAMAHA Bond No. 1215 (Three-
®
Bond No. 1215):
90890-85505
4-63
AC MAGNETO