Inspection; Reassembly - Suzuki drz 400E Service Manual

4-14 FUEL AND LUBRICATION SYSTEM

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 1
Pilot air jet 2
Needle jet air bleeding hole
NEEDLE VALVE INSPECTION
If foreign matter is caught between the valve seat and the needle
valve, the gasoline will continue flowing and overflow. If the valve
seat and needle valve are worn beyond the permissible limits,
similar trouble will occur. Conversely, if the needle valve sticks,
the gasoline will not flow into the float chamber.
Clean the float chamber and float parts with gasoline. If the needle
valve is worn as shown, replace it and the valve seat a new one.
Clean the fuel passage of the mixing chamber using compressed
air.
FLOAT HEIGHT ADJUSTMENT
To check the float height, turn the carburetor upside down.
Measure the float height A while the float arm is just contacting
the needle valve using vernier calipers.
Bend the tongue as necessary to bring the float height A to the
specified level.
09900-20101: Vernier calipers
Float height A: 9.0 ± 1.0 mm (0.35 ± 0.04 in)
THROTTLE POSITION SENSOR INSPECTION
Measure the resistance between the terminals as shown in the
illustration.
Throttle position sensor resistance:
NOTE:
When performing this test, it is not necessary to remove the
throttle position sensor.

REASSEMBLY

Reassemble the carburetor in the reverse order of disassem-
bly. Pay special attention to the following points:
PILOT SCREW
After cleaning, install the pilot screw 1 to the original setting
by turning the screw in until it lightly seats, and then backing
it out the same number of turns counted during disassembly.
Replace the removed O-ring with a new one.
Float
Needle valve
Valve seat
Jet needle
Piston valve
Starter (enricher) jet
Approximately 5 kΩ Ω Ω Ω Ω
O-ring
Throttle valve
Diaphragm
Pilot outlet and bypass ports
A
Bl
B
1 Pilot screw
109
Y
Ω
2 Carburetor body