Checking The Float; Checking The Air Cut Valve; Assembling The Carburetor; Checking The Accelerator Pump - Yamaha WR250F(D) Owner's Service Manual

e. If both are fine, adjust the float
height by bending the float tab "b"
on the float.
f. Recheck the float height.

CHECKING THE FLOAT

1. Inspect:
• Float "1"
Damage → Replace.
CHECKING THE STARTER
PLUNGER
1. Inspect:
• Cold starter plunger "1"
• Hot starter plunger "2"
Wear/damage → Replace.
CHECKING THE ACCELERATOR
PUMP
1. Inspect:
• Diaphragm (accelerator pump)
"1"
• Spring (accelerator pump) "2"
• Accelerator pump cover "3"
• O-ring "4"
• Push rod "5"
Tears (diaphragm)/damage→Re-
place.
Dirt → Clean.
2. Inspect:
• Throttle shaft "1"
• Spring "2"
• Lever 1 "3"
• Spring 1 "4"
• Lever 2 "5"
• Spring 2 "6"
Dirt → Clean.

CHECKING THE AIR CUT VALVE

1. Inspect:
• Diaphragm (air cut valve) "1"
• Spring (air cut valve) "2"
• Air cut valve cover "3"
• O-ring "4"
Tears (diaphragm)/damage→Re-
place.

ASSEMBLING THE CARBURETOR

1. Install:
• Cold starter plunger "1"
2. Install:
• Pilot air jet "1"
• Main air jet "2"
3. Install:
• Spring 1 "1"
• Lever 1 "2"
To lever 2 "3".
Make sure the spring 1 fits on the
stopper "a" of the lever 2.
5-8
CARBURETOR
4. Install:
• Spring 2 "1"
To lever 2 "2".
5. Install:
• Push rod link lever assembly "1"
Make sure the stopper "a" of the
spring 2 fits into the recess "b" in the
carburetor.
6. Install:
• Washer "1"
• Circlip "2"
7. Install:
• Spring "1"
To throttle shaft "2".
Install the bigger hook "a" of the
spring fits on the stopper "b" of the
throttle shaft pulley.