Yamaha YZ250 2021 User Manual

CHASSIS SPECIFICATIONS
2-4
EAM20129
CHASSIS SPECIFICATIONS
Chassis
Frame type Semi double cradle
Caster angle 27.7 
Trail 122 mm (4.8 in)
Front wheel
Wheel type Spoke wheel
Rim size 21 x 1.60
Rear wheel
Wheel type Spoke wheel
Rim size 18 x 2.15 (YZ250X)
19 x 2.15 (YZ250)
Front tire
Type With tube
Size 80/100-21 51M (YZ250)
90/90-21 54M (YZ250X)
Manufacturer/model DUNLOP/AT81F (YZ250X)
DUNLOP/MX52F (YZ250)
Rear tire
Type With tube
Size 110/100-18 64M (YZ250X)
110/90-19 62M (YZ250)
Manufacturer/model DUNLOP/AT81 (YZ250X)
DUNLOP/MX52 (YZ250)
Tire air pressure (measured on cold tires)
Front 100 kPa (1.00 kgf/cm², 15 psi)
Rear 100 kPa (1.00 kgf/cm², 15 psi)
Front brake
Type Hydraulic single disc brake
Brake pad lining thickness limit 1.0 mm (0.04 in)
Specified brake fluid DOT 4
Rear brake
Type Hydraulic single disc brake
Brake pedal position 0.0 mm (0.00 in)
Brake pad lining thickness limit 1.0 mm (0.04 in)
Specified brake fluid DOT 4
Front suspension
Type Telescopic fork
Spring Coil spring
Shock absorber Hydraulic damper
Wheel travel 300 mm (11.8 in)
Fork spring free length limit 449.0 mm (17.68 in)
Inner tube bending limit 0.2 mm (0.01 in)
Recommended oil Yamaha Suspension Oil S1
Quantity (left) 515.0 cm³ (17.41 US oz, 18.16 Imp.oz)
Quantity (right) 515.0 cm³ (17.41 US oz, 18.16 Imp.oz)

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