Yamaha WR250F 2003 [122/304] Carburetor

4 - 18

ENG

CARBURETOR

15. Install:

● Jet needle 1

● Collar 2

● Spring 3

● Needle holder 4

● Throttle valve plate 5

To throttle valve 6.

16. Install:

● Throttle valve assembly 1

● Screw (throttle shaft) 2

NOTE:

Install the valve lever rollers 3 into the slits a

of the throttle valve.

17. Install:

● O-ring 1

● Valve lever housing cover 2

● Bolt (valve lever housing cover) 3

18. 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:

1.25 mm (0.049 in)