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FUEL SYSTEM
CARBURETOR BODY CLEANING
• Some commercially available chemical cleaners are
very caustic. These cleaners may damage non-
metallic parts such as the O-ring, the float, and the
float valve of the carburetor. Check the container for
instructions. If you are in doubt, do not use these
products to clean a Honda carburetor.
• High air pressure may damage the carburetor. Use
low air pressure (0.2 MPa (30 psi) or less) when
cleaning passages and ports.
Clean the carburetor body [1] with high flash point
solvent.
Clean thoroughly the following passages and ports with
low-pressure compressed air.
– Pilot screw hole [2]
– Pilot jet hole [3]
– Pilot air jet [4]
– Main air jet [5]
– Transition ports [6]
– Pilot outlet [7]
– Main nozzle holder [8]
– Vent port [9]
CARBURETOR INSPECTION
FLOAT LEVEL HEIGHT
Place the carburetor in the position as shown, and
measure the distance between the float top [1] and
carburetor body [2] when the float just contacts the float
valve without compressing the valve spring.
If the height is out of the specification, replace the float
and/or the float valve and recheck the height.
To prevent serious eye injury, always wear safety
goggles or other eye protection when using
compressed air.
[9]
[7]
[8]
[3]
[2]
[5]
[6]
[1]
INTAKE SIDE:
[4]
ENGINE SIDE:
TOOL:
Float level gauge [3] 07401-0010000
Standard float height: 10.2 mm (0.40 in)
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