Inspection - Suzuki GSF650S Service Manual

4-20 FUEL SYSTEM

INSPECTION

Check the following items for any damage or clogging.
* Slow jet
* Main jet
* Main air jet
* Slow air jet
* Needle jet air bleeding hole * Throttle shaft oil seal
* Float
* Needle valve
* Jet needle
NEEDLE VALVE
If foreign matter is caught between the valve seat and the nee-
dle 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. Clean the fuel passage of the mixing chamber using
compressed air.
CARBURETOR HEATER (E-02, 19)
• Remove the carburetor assembly. ("4-15)
• Disconnect the carburetor heater terminal lead wires.
• Connect the + terminal of a 12V battery to the terminal 1 of the
carburetor heater and the battery - terminal to the terminal 2.
• Check that the heater section A is heated in 5 minutes after the
battery has been connected. If the carburetor heater is not
heated up, replace the carburetor heater with a new one.
!
Do not touch the carburetor heater directly to prevent
burn.
THERMO-SWITCH (E-02, 19)
• Cool the thermo-switch 1 with ice water and check for continu-
ity.
% 09900-25008: Multi-circuit tester
&
Thermo-switch
continuity Above 15 – 21 °C
* Valve seat
* Piston valve
* Starter (enricher) jet
* Gasket and O-ring
* Diaphragm
* Pilot outlet and by-pass ports
Below 8 – 14 °C
CORRECT
Yes
No
INCORRECT