Chapter 5 – Fuel feed system
Service manual AJP PR3/PR4 5 - 12
WASHING AND CLEANING THE
CARBURETOR
Make a wash and the most thorough cleaning
possible and blow out with compressed air
each part to remove all dirt and any residue
that may exist in the carburetor.
There should be paid special attention to the
residues that often are formed and
accumulate around the main diffuser and in
the respective carburetor hole.
Do not allow the gaskets, O-ring seals or dust
cover rubbers remain too long in contact with
the solvent used in cleaning the carburetor
parts, so they are not damaged. After washing
the parts, dry out quickly with compressed air.
Blow very well each hole and internal
conducts of the carburetor to eliminate
completely any impurities that may clog the
carburetor and prevent their proper
functioning.
INSPECTION OF CARBURETOR
Check that the float chamber does not have
cracks or warping, or if the breather inner tube
is not broken. If necessary, replace the gasket
of the float chamber to assemble the set.
Remove the drain screw in the float chamber
and replace the sealing ring.
Remove the jets and verify the calibration and
any damage.
Clean the jets with fuel and compressed air to
remove impurities.
Also remove the mixture adjusting screw.
Remove and check the pin (1), the float (2)
and the needle (3) regarding the existence of
possible damage.
Check the operation of air butterfly.
