Yamaha WR450F 2003 Manual De Servicio Del Propietario página 214

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PILOT SCREW ADJUSTMENT

10. Install:

Oil filler plug

11. Inspect:

Engine (for oil leaks)

Refer to "ENGINE OIL LEVEL INSPEC-

Oil pressure

Checking steps:

Slightly loosen the oil gallery bolt 1.

Start the engine and keep it idling until oil

starts to seep from the oil gallery bolt. If no

oil comes out after one minute, turn the

engine off so it will not seize.

Check oil passages, oil filter and oil pump

for damage or leakage.

Start the engine after solving the prob-

lem(s) and recheck the oil pressure.

Tighten the oil gallery bolt to specification.

Oil gallery bolt:

10 Nm (1.0 m • kg, 7.2 ft • lb)

PILOT SCREW ADJUSTMENT

Pilot screw 1

Adjusting steps:

To optimize the fuel flow at a smaller throttle

opening, each machine's pilot screw has

been individually set at the factory. Before

adjusting the pilot screw, turn it in fully and

count the number of turns. Record this num-

ber as the factory-set number of turns out.

Turn in the pilot screw until it is lightly

Turn out the pilot screw by the factory-set

number of turns.

Pilot screw:

1-3/4 turns out (example)

*1-1/2 turns out (example)

* Except for USA

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