Cleaning; Inspection - Suzuki DR-Z400S 2001 Service Manual

4-10 FUEL AND LUBRICATION SYSTEM

CLEANING

Some carburetor cleaning chemicals, especially dip-
type soaking solutions, are very corrosive and must
be handled carefully. Always follow the chemical
manufacturer's instructions for 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
perceived problem area. Clean the circuits in the carburetor
body with a spray-type cleaner. If necessary, soak each cir-
cuit in a dip-type cleaning solution to loosen dirt and varnish.
Dry the carburetor body using compressed air.
Do not use wire to clean the passageways, valve seat,
and jets. If the components cannot be cleaned with a
spray-type cleaner it may be necessary to soak them
in a dip-type cleaning solution. Always follow the chemi-
cal manufacturer's instructions for proper use and
cleaning of the carburetor components.
After cleaning, reassemble the carburetor with new O-rings.
Replace the removed O-rings with new ones.

INSPECTION

Check the following items for any damage or clogging. If any
damages are found, replace the damaged parts with new ones.
Pilot jet
Main jet
Main air jet
Pilot air jet
Needle jet air bleeding hol
Float
Needle valve
Pilot outlet and bypass ports
Valve seat
Jet needle
Piston valve
Starter (enricher) jet
O-ring
Throttle valve
Diaphragm