Buell 2002 P3 Service Manual page 243

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CLEANING AND INSPECTION
Carburetor Housing
1. Clean all internal air/fuel passages in carburetor housing
with carburetor cleaner. Blow out passages using low
pressure compressed air. Proceed as follows:
11 1
WARNING
Compressed air can pierce the skin and cause injury.
Never use your hand to check for leaks or to determine
air flow rates. Wear safety glasses to shield your eyes
from flying dirt and debris. Failure to comply could result
in death or serious injury.
Slow Speed Circuit
a. Spray carburetor cleaner into air inlet hole of slow
speed circuit. See A of
verify that solution exits slow jet bore at bottom of
carburetor housing. See B of
finger over slow jet bore, verify that solution exits
four pin holes just inboard of the throttle plate, as
well as the single pin hole outboard of the throttle
plate.
b. Using a tapered, rubber-tipped nozzle on the air
hose (to prevent both loss of air pressure and to
avoid scratching or nicking the bore), apply low
pressure compressed air into air inlet hole to blow
carburetor cleaner out of slow jet bore. Placing
gloved finger over slow jet bore, blow carburetor
cleaner out of pin holes inboard and outboard of
throttle plate.
Main Circuit
a. Plugging main jet hole in carburetor throat, spray
carburetor cleaner into air inlet hole of main circuit.
See A of Figure 4-19.
solution exits main jet bore at bottom of carburetor
housing. See B of Figure 4-19.
b. Using a tapered, rubber-tipped nozzle on the air
hose (to prevent both loss of air pressure and to
avoid scratching or nicking the bore), apply low
pressure compressed air into air inlet hole to blow
carburetor cleaner out of hole in carburetor throat.
Placing gloved finger over hole in carburetor throat,
blow carburetor cleaner out of main jet bore at bot-
tom of carburetor housing.
Float Bowl Vent
a. Spray carburetor cleaner into air inlet hole of float
bowl vent. See A of
ify that solution exits two holes in float bowl chamber
at bottom of carburetor housing. See B of
19.
b. Using a tapered, rubber-tipped nozzle on the air
hose (to prevent both loss of air pressure and to
avoid scratching or nicking the bore), apply low
pressure compressed air into air inlet hole of float
bowl vent to blow carburetor cleaner out of holes in
float bowl chamber.
4-18 2002 Buell P3: Fuel System
WARNING
Figure 4-19. While spraying,
Figure 4-19. Placing
While spraying, verify that
Figure 4-19. While spraying, ver-
Figure 4-
A
Slow Speed
Circuit
Air Inlet
B
Vent
Holes
Main Jet
Bore
Figure 4-19. Clean Air/Fuel Passages in Carburetor
Top End Components
1. Thoroughly clean all loose parts (except diaphragm) with
carburetor cleaner. See
pressure compressed air.
11 1
WARNING
Compressed air can pierce the skin and cause injury.
Never use your hand to check for leaks or to determine
air flow rates. Wear safety glasses to shield your eyes
from flying dirt and debris. Failure to comply could result
in death or serious injury.
2. Inspect parts as follows:
a. Hold vacuum piston up to strong light source. Exam-
ine diaphragm for pin holes, cuts, tears or pinching.
Replace if any damage is found.
b. Examine passage at bottom of vacuum piston bore.
Verify that passage is clean and open.
c. Examine vacuum piston spring for stretching, crimp-
ing, distortion or other damage. Inspect spring seat
for cracks. Replace parts if necessary.
d. Examine slides at sides of vacuum piston to verify
that surfaces are clean and smooth. Clean or buff
out any rough surfaces.
e. Examine tip of jet needle for grooves or scratches.
Needle should be completely straight, while surface
condition at taper should be smooth and even.
Replace needle if necessary.
7764
Float Bowl
Vent
Air Inlet
Main Circuit
Air Inlet
7762
Slow Jet
Bore
Figure 4-15. Blow dry using low
WARNING