3-16 FUEL SYSTEM
Immerse all the metal parts in carburetor cleaning solu-
Rinse the parts in water.
After the parts are cleaned, dry them with compressed air.
Blow through the air and fuel passages with compressed
Assemble the carburetor, and install it on the motorcycle.
Gasoline is extremely flammable and can be ex-
plosive under certain conditions. Always stop the
engine and do not smoke. Make sure the area is
well-ventilated and free from any source of flame
or sparks; this includes any appliance with a pilot
Remove the carburetor (see Carburetor Removal).
Before disassembling the carburetor, check the fuel level.
If the fuel level is incorrect, inspect the rest of the carbu-
retor before correcting it.
Check that the throttle valve [A] moves smoothly and re-
turn back with the spring tension. The surface of the valve
must not be excessively worn.
If the throttle valve does not move smoothly, or if it is very
loose in the carburetor body. Replace the carburetor.
If the spring tension is weak, replace it.
Turn the choke cable bracket to check that the choke but-
terfly valve [A] move smoothly and return with spring ten-
If the choke butterfly valve do not move smoothly, replace
Do not remove the pilot screw from the carburetor or
change the pilot screw setting, or you will lose the best
Disassemble the carburetor (see Carburetor Disassem-
Clean the carburetor (see Carburetor Cleaning).
Check that the O-rings on the float bowl, drain plug and
the intake pipe are in good condition.
If any of the O-rings are not in good condition, replace