Yamaha WR250F Manuel D'atelier page 54

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CONTROL FUNCTIONS

The fuel cock supplies fuel from the tank to

carburetor while filtering 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 posi-

tion 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:This indicates reserve. If you run out of

fuel while riding, move the lever to this

position. FILL THE TANK AT THE FIRST

OPPORTUNITY. BE SURE TO SET THE

LEVER TO "ON" AFTER REFUELING.

COLD STARTER KNOB

When cold, the engine requires a richer air-fuel

mixture for starting. A separate starter circuit,

which is controlled by the cold starter knob 1,

supplies this mixture. Pull the cold starter knob

out to open the circuit for starting. When the

engine has warmed up, push it in to close the

HOT STARTER KNOB

The hot starter knob (red) 1 is used when

starting a warm engine.

Use the hot starter knob when starting the

engine again immediately after it was stopped

(the engine is still warm). Pulling out the hot

starter knob injects secondary air to thin the

air-fuel mixture temporarily, allowing the

engine to be started more easily.

After the engine has started, be sure to

push the hot starter knob back in.