Yamaha YZ250F User Manual

AC MAGNETO
5-60
2. Install:
• Woodruff key “1”
• Rotor “2”
TIP
• Clean the contact surfaces of the tapered por-
tions of the crankshaft and rotor.
• When installing the woodruff key, make sure
that its flat surface “a” is in parallel with the
crankshaft center line “b”.
• When installing the rotor, align the keyway “c”
of the rotor with the woodruff key.
3. Install:
• Washers
• Nut (rotor) “1”
4. Install:
• Dowel pin “1”
• Gasket (left crankcase cover) “2”
• Left crankcase cover “3”
• Lead holder “4”
• Bolt (left crankcase cover) “5”
TIP
Tighten the bolts in stages and in a crisscross
pattern.
5. Connect:
• AC magneto lead
Refer to “CABLE ROUTING DIAGRAM” on
page 2-31.
Nut (rotor)
65 Nm (6.5 m·kgf, 47 ft·lbf)
Bolt (left crankcase cover)
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
b1
1
c
2
a
T
R
.
.
1
New
T
R
.
.
1
1
2
3
5
5
5
5
4
4
5

Yamaha YZ250F Specifications

General

Displacement	250cc
Bore x Stroke	77.0 mm x 53.6 mm
Final Drive	Chain
Suspension / Rear	KYB® single shock; fully adjustable, 12.5-in travel
Brakes / Front	Hydraulic single disc brake, 270mm
Brakes / Rear	Hydraulic single disc brake, 240mm
Fuel Capacity	1.6 gal
Engine Type	Liquid-cooled, DOHC, 4-stroke
Fuel Delivery	Fuel injection
Ignition	TCI
Transmission	5-speed; multiplate wet clutch
Suspension / Front	KYB® Speed-Sensitive System inverted fork; fully adjustable, 12.2-in travel
Tires / Front	80/100-21