Yamaha YZ250 2021 User Manual

REAR BRAKE
4-7
EAM20098
REAR BRAKE
EAM30523
REPLACING THE REAR BRAKE PADS
TIP
When replacing the brake pads, it is not neces-
sary to disconnect the brake hose or disassem-
ble the brake caliper.
1. Remove:
• Brake pad
a. Remove the protector “1” and the pad pin
plug “2”.
b. Loosen the pad pin “3”.
c. Remove the rear wheel “4” and the brake
caliper “5”.
Refer to “REAR WHEEL” on page 4-3.
d. Remove the pad pin “6” and the brake
pads “7”.
2. Measure:
• Brake pad wear limit “a”
Out of specification  Replace the brake
pads as a set.
3. Install:
• Brake pad
a. Connect the plastic hose “1” to the bleed
screw “2” and place a container under the
end of the plastic hose.
b. Loosen the bleed screw and push the
brake caliper piston in.
WARNING
EWA19170
Do not reuse the drained brake fluid.
c. Tighten the bleed screw.
d. Install the brake pad “3” and the pad pin
“4”.
TIP
• Install the brake pads with their projections “a”
into the brake caliper recesses “b”.
• Temporarily tighten the pad pin at this point.
7
6
Brake pad lining thickness limit
1.0 mm (0.04 in)
Brake caliper bleed screw
6 N·m (0.6 kgf·m, 4.4 lb·ft)
a
2
1
T
R
.
.

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