Yamaha WR250FM Accelerator pump timing adjustment Adjustment steps, Throttle valve height Mm 0.06

CARBURETOR

ENG

19.Install:

• Carburetor breather hose 1

NOTE:

Install the carburetor breather hoses to the carburetor so that the hoses do not bend near where they are installed.

Accelerator pump timing adjustment

Adjustment steps:

NOTE:

In order for the throttle valve height a to achieve the specified value, tuck under the throttle valve plate 1 the rod 2 etc. with the same outer diameter as the specified value.

Throttle valve height:

1.5mm (0.06 in)

•Fully turn in the accelerator pump adjust- ing screw 3.

•Check that the link lever 4 has free play b by pushing lightly on it.

•Gradually turn out the adjusting screw while moving the link lever until it has no more free play.

Carburetor installation

1.Install:

• Carburetor joint 1

T.

R.

3 Nm (0.3 m · kg, 2.2 ft · lb)

NOTE:

Install the projection a on the cylinder between the carburetor joint slots b.

2.Install:

• Carburetor 1

NOTE:

Install the projection a between the carburetor joint slots.

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