Yamaha YZ250 2021 User Manual

STEERING HEAD
4-24
EAM20101
STEERING HEAD
EAM30060
REMOVING THE LOWER BRACKET
1. Use a maintenance stand to raise the front
wheel off the ground.
WARNING
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
2. Remove:
• Ring nut “1”
TIP
Remove the ring nut with the steering nut
wrench “2”.
WARNING
EWA13730
Securely support the lower bracket so that
there is no danger of it falling.
EAM30061
CHECKING THE STEERING HEAD
1. Wash with kerosene:
• Bearing
• Bearing race
2. Check:
• Bearing
• Bearing race
Damage/pitting  Replace.
3. Replace:
• Bearing
• Bearing race
a. Remove the bearing race from the steer-
ing head pipe “1” with a long rod “2” and a
hammer.
b. Remove the bearing race from the lower
bracket “3” with a chisel “4” and a hammer.
c. Install a new bearing race.
NOTICE
ECA14270
If the bearing race is not installed properly,
the steering head pipe could be damaged.
TIP
Always replace the bearing and the bearing race
as a set.
4. Check:
• Upper bracket
• Lower bracket
(along with the steering stem)
Bends/cracks/damage  Replace.
EAM30062
INSTALLING THE STEERING HEAD
1. Install:
• Lower bearing “1”
TIP
Apply the lithium-soap-based grease on the dust
seal lip and bearing inner circumference.
Steering nut wrench
90890-01403
Exhaust flange nut wrench
YU-A9472
G088933
G088934

Yamaha YZ250 2021 Specifications

General

Engine Type	249cc liquid-cooled 2-stroke; reed-valve inducted
Bore x Stroke	66.4mm x 72.0mm
Compression Ratio	8.9~10.6:1
Ignition	CDI
Transmission	5-speed; multiplate wet clutch
Final Drive	Chain
Suspension Rear	KYB® single shock; fully adjustable, 12.4-in travel
Brakes Front	Hydraulic disc, 270mm
Tires Front	80/100-21
Tires Rear	110/90-19
Width	32.5 in
Height	50.8 in
Wheelbase	58.5 in
Ground Clearance	14.2 in
Fuel Capacity	2.1 gal
Wet Weight	227 lb
Fuel Delivery	Keihin PWK38S carburetor
Suspension Front	KYB® Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel
Brakes Rear	Hydraulic disc, 245mm