Yamaha YZ250F(W) Owner's Service Manual page 300

CARBURETOR
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:
0.8 mm (0.031 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
2. Install:
• Carburetor 1
NOTE:
Install the projection a between the carburetor
joint slots.
4 - 20
ENG
10 Nm (1.0 m · kg, 7.2 ft · lb)