Yamaha YZ250 2021 User Manual

INSTRUMENT AND CONTROL FUNCTIONS
1-10
in this position.
EAM30537
FUEL COCK (for YZ250X)
The fuel cock supplies fuel from the tank to car-
buretor and also filters the fuel. The fuel cock
has the three positions:
OFF:
With the lever in this position, fuel will not flow.
Always return the lever to this position when the
engine is not running.
ON:
With the lever in this position, fuel flows to the
carburetor. Normal riding is done with the lever
in this position.
RES:
With the lever in this position fuel flows to the
carburetor from the reserve section of the fuel
tank after the main supply of the fuel has been
depleted. Normal riding is possible with the lever
is in this position, but it is recommended to add
fuel as soon as possible.
EAM30444
STARTER KNOB (CHOKE)
When cold, the engine requires a richer air-fuel
mixture for starting. A separate starter circuit,
which is controlled by the starter knob “1”, sup-
plies this mixture. Pull the starter knob out to
open the circuit for starting. When the engine
has warmed up, push it in to close the circuit.
EAM30190
SIDESTAND (for YZ250X)
This sidestand “1” is used to support only the
machine when standing or transporting it.
WARNING
EWA18980
• Never apply additional force to the sides-
tand.
• Hold up the sidestand before starting out.

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