Float Height Inspection And Adjustment; Carburetor Inspection And Cleaning - Suzuki LT-A400 Service Manual

1G-21 Fuel System:

Float Height Inspection and Adjustment

Inspect and adjust the float height in the following
procedures:
1) Remove the carburetor assembly. Refer to
"Carburetor Assembly Removal and Installation
(Page 1G-17)".
2) Remove the float chamber body. Refer to
"Carburetor Disassembly (Page 1G-17)".
3) To check the float height, tilt the carburetor as
shown.
4) Measure the float height "a" while the float arm is just
contacting the needle valve using vernier calipers.
Bend the tongue "A" as necessary to bring the float
height "a" to the specified level.
Special tool
: 09900–20102 (Vernier calipers (1/20 mm,
200 mm))
Float height "a"
17.0 ± 1.0 mm (0.67 ± 0.04 in)
5) Reinstall the float chamber body. Refer to
"Carburetor Assembly (Page 1G-20)".
6) Reinstall the carburetor assembly. Refer to
"Carburetor Assembly Removal and Installation
(Page 1G-17)".
B827H11706031
" a "
I827H1170014-01
"A"
I827H1170015-01

Carburetor Inspection and Cleaning

Refer to "Carburetor Assembly (Page 1G-20)" and
"Carburetor Disassembly (Page 1G-17)".
Carburetor Parts
Check the following items for any damage or clogging.
If they are clogged, clean the fuel passage.
• Slow jet
• Main jet
• Main air jet
• Slow air jet
• Needle jet holder air bleeding holes
• Float
• Jet needle
• Valve seat
• Piston valve
• Starter (enricher) jet
• O-rings
• Throttle valve
• Diaphragm
• Pilot outlet and by-pass ports
Needle Valve
Check the needle valve for damage or worn.
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 in the illustration, replace it along with a new
valve seat.
CORRECT
Throttle Valve
Check the throttle valve moves smoothly from full open
to full close. If it does not smoothly, clean the carburetor.
B827H11706032
INCORRECT
I649G1170060-02