Removing The Ac Magneto; Checking The Ac Magneto; Checking The Woodruff Key; Installing The Ac Magneto - Yamaha YZ450FX 2019 Owner's Service Manual

EAM30375

REMOVING THE AC MAGNETO

1. Remove:
• Nut (rotor) "1"
• Washer
2. Remove:
• Rotor "1"
Use the rotor puller "2" to remove the rotor.
• Woodruff key
Rotor puller
90890-04151
Rotor puller
YM-04151
EAM30376

CHECKING THE AC MAGNETO

1. Check:
• Rotor "1" inner surface "a"
• Stator "2" outer surface "b"
Damage  Inspect the crankshaft runout and
crankshaft bearing.
1
a
1
1
2
b
2
5-58
EAM30377

CHECKING THE WOODRUFF KEY

1. Check:
• Woodruff key "1"
Damage  Replace.
1
EAM30378

INSTALLING THE AC MAGNETO

1. Install:
• Stator "1"
• Screw (stator) "2"
Screw (stator)
10 N·m (1.0 kgf·m, 7.4 lb·ft)
LOCTITE®
• Crankshaft position sensor "3"
• Bolt (crankshaft position sensor) "4"
• Holder
• Bolt (holder)
Bolt (crankshaft position sensor)
10 N·m (1.0 kgf·m, 7.4 lb·ft)
LOCTITE®
Holder
8 N·m (0.8 kgf·m, 5.9 lb·ft)
LOCTITE®
TIP
• Apply the sealant to the grommet of the AC
magneto lead.
• Tighten the stator coil screws using the T25 bit.
• Pass the AC magneto lead through the crank-
case cover side.
Yamaha bond No. 1215
90890-85505
(Three bond No.1215®)
AC MAGNETO