Suzuki 2005 GSF1200 Service Manual page 167

Slow System
This system supplies fuel during engine operation when the throttle valve (1) is closed or slightly opened. The fuel
from the float chamber (2) is metered by the pilot jet (3) where it mixes with air coming in through the pilot air jet (4).
This mixture, rich with fuel, then goes up through the pilot passage to the pilot screw (5). Part of the mixture is
discharged into the main bore through bypass ports (6). The mixture is metered by the pilot screw (5) and sprayed into
the main bore through the pilot outlet port (7).
1
7
5
3
1. Throttle valve
2. Float chamber
4
6
2
3. Pilot jet 5. Pilot screw
4. Pilot air jet 6. Bypass ports
"A"
"B"
"C"
7. Pilot outlet port "B": Fuel/Air mixture
"A": Air "C": Fuel
Fuel System: 1G-5
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