Yamaha WR250F 2022 User Manual

GENERATOR
5-38
EAM30487
REMOVING THE GENERATOR
1. Remove:
• Nut (generator rotor) “1”
• Washer
2. Remove:
• Generator rotor “1”
(with the rotor puller “2”)
• Woodruff key
EAM30488
CHECKING THE GENERATOR
1. Check:
• Generator rotor “1” inner surface “a”
• Stator coil assembly “2” outer surface “b”
Damage  Inspect the crankshaft runout and
crankshaft bearing.
EAM30377
CHECKING THE WOODRUFF KEY
1. Check:
• Woodruff key “1”
Damage  Replace.
EAM30489
INSTALLING THE GENERATOR
1. Install:
• Stator coil assembly “1”
• Screw (stator coil assembly) “2”
• Crankshaft position sensor “3”
• Bolt (crankshaft position sensor) “4”
• Holder
• Bolt (holder)
TIP
• Apply the sealant to the grommet of the stator
coil assembly lead.
• Tighten the stator coil assembly screws using
the T25 bit.
• Pass the stator coil assembly lead through the
crankcase cover side.
Rotor puller
90890-04151
Rotor puller
YM-04151
1
1
2
1
a
2
b
Screw (stator coil assembly)
10 N·m (1.0 kgf·m, 7.4 lb·ft)
LOCTITE®
Bolt (crankshaft position sensor)
10 N·m (1.0 kgf·m, 7.4 lb·ft)
LOCTITE®
Bolt (holder)
8 N·m (0.8 kgf·m, 5.9 lb·ft)
LOCTITE®
Yamaha bond No. 1215
90890-85505
Three bond No. 1215®
1
T
R
.
.
T
R
.
.

Yamaha WR250F 2022 Specifications

General

Bore x Stroke	77.0mm x 53.6mm
Compression Ratio	13.8:1
Ignition	TCI: Transistor Controlled Ignition
Final Drive	Chain
Suspension Rear	KYB® single shock; fully adjustable, 12.5-in travel
Length	85.6 in
Width	32.5 in
Height	50.0 in
Seat Height	38.2 in
Wheelbase	58.3 in
Rake (Caster Angle)	27.2°
Trail	4.6 in
Fuel Capacity	2.2 gal
Wet Weight	254 lb
Engine Type	Liquid-cooled, DOHC, 4-stroke
Fuel Delivery	Fuel injection
Suspension Front	KYB® Speed-Sensitive System inverted fork; fully adjustable
Brakes Front	Hydraulic single disc
Brakes Rear	Hydraulic single disc brake
Tires Front	80/100-21
Tires Rear	110/100-18