Yamaha YZ250 2021 User Manual

CHASSIS
3-13
EAM20136
CHASSIS
EAM30479
ADJUSTING THE FRONT DISC BRAKE
TIP
There should be no free play at the brake lever
end.
1. Check:
• Brake lever position “a”
2. Remove:
• Brake lever cover
3. Adjust:
• Brake lever position
a. Loosen the locknut “1”.
b. Turn the adjusting bolt “2” until the speci-
fied brake lever position is obtained.
c. Tighten the locknut.
WARNING
EWA13050
A soft or spongy feeling in the brake lever
can indicate the presence of air in the brake
system. Before the vehicle is operated, the
air must be removed by bleeding the brake
system. Air in the brake system will consid-
erably reduce braking performance.
NOTICE
ECA13490
After adjusting the brake lever position,
make sure there is no brake drag.
4. Install:
• Brake lever cover
EAM30480
ADJUSTING THE REAR DISC BRAKE
1. Check:
• Brake pedal position “a”
Out of specification  Adjust.
2. Adjust:
• Brake pedal position
a. Loosen the locknut “1”.
b. Turn the adjusting nut “2” until the speci-
fied brake pedal position is obtained.
WARNING
EWA20710
Adjust the pedal height between the maxi-
mum “A” and the minimum “B” as shown. (In
this adjustment, the bolt “3” end “a” should
protrude out of the lower adjusting nut “4”
but not be less than 2.0 mm (0.08 in) “b”
away from the brake pedal “5”).
Brake lever position
100 mm (3.94 in)
Extent of adjustment
86–105 mm (3.39–4.13 in)
Locknut (front brake lever posi-
tion)
5 N·m (0.5 kgf·m, 3.7 lb·ft)
a
G088889
2
1
T
R
.
.
Brake pedal position (above the
top of the footrest)
0.0 mm (0.00 in)
2
1

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