4-14 FUEL AND LUBRICATION SYSTEM
INSPECTION
Check the following parts for damage and clogging.
* Pilot jet * Piston valve
* Main jet * Starter jet
* Main air jet * Gaskets and O-rings
* Pilot air jet * Pilot outlet and bypass
* Needle jet holder * Coasting enrichement valve
* Float * Needle valve
* Jet needle * Valve seat
If any abnormal condition is found, wash the part clean. If dam-
age or clogging is found, replace the part with a new one.
CARBURETOR CLEANING
!
Some carburetor cleaning chemicals, especially diptype
soaking solutions, are very corrosive and must be
handled carefully. Always follow the chemical
manufacturer’s instructions on proper use, handling
and storage.
• Clean all jets with a spray-type carburetor cleaner and dry
them using compressed air.
• Clean all circuits of the carburetor thoroughly-not just the per-
ceived problem area. Clean the circuits in the carburetor body
with a spray-type cleaner and allow each circuit to soak, if
necessary, to loosen dirt and varnish. Blow the body dry using
compressed air.
7
Do not use a wire to clean the jets or passageways. A
wire can damage the jets and passageways. If the com-
ponents cannot be cleaned with a spray cleaner it may
be necessary to use a dip-type cleaning solution and
allow them to soak. Always follow the chemical
manufacturer’s instructions for proper use and clean-
ing of the carburetor components.
• After cleaning, reassemble the carburetor with new seals and
gaskets.
Check for stopped wear
Foreign
substance
Needle value
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