Yamaha WR250F(P), Owner'S Service Manual

Page: 304 / 694

4 - 18
ENG
CARBURETOR
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 adjustmet
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:
1.50 mm (0.059 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:
●
Clamp 1
NOTE:
Install the projections
a
on the carburetor joint
between the clamp ends.
a
a
1
1
2. Install:
●
Carburetor joint 1
NOTE:
Install the projection
a
on the cylinder head
between the carburetor joint slots
b
.
T
R .
.
3 Nm (0.3 m · kg, 2.2 ft · lb)