Yamaha 2004 WR250FS Owner's Service Manual page 140

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CARBURETOR
14. Install:
• Diaphragm (air cut valve) 1
• Spring (air cut valve) 2
• O-ring 3
• Air cut valve cover 4
• Screw (air cut valve cover) 5
15. Install:
• Diaphragm (accelerator pump) 1
• Spring 2
• O-ring 3
• Accelerator pump cover 4
• Hose holder (drain hose) 5
• Screw (accelerator pump cover) 6
NOTE:
Install the diaphragm (accelerator pump) with
its mark a facing the spring.
16. Install:
• Jet needle 1
• Collar 2
• Spring 3
• Needle holder 4
• Throttle valve plate 5
To throttle valve 6.
17. Install:
• Throttle valve assembly 1
• Screw (throttle shaft) 2
NOTE:
Install the valve lever rollers 3 into the slits a
of the throttle valve.
18. Install:
• O-ring 1
• Valve lever housing cover 2
• Bolt (valve lever housing cover) 3
ENG