Slow System; Main System - Suzuki FD 110 XCS Service Manual

SLOW SYSTEM

This system supplies fuel to the engine operation with the piston valve 5 close or slightly opened. The fuel
from the float chamber 6 is metered by the pilot jet 8. Where it mixes with air coming in the pilot air jet #1
and pilot air passage 9. This mixture, rich with fuel, then goes up through to pilot air screw 4. The mixture
is discharged into the pilot air passage.
1) VACUUM
2) ----
3) ----
4) PILOT SCREW
5) PISTON

MAIN SYSTEM

This system supplies fuel during engine operation when the piston valve is ¼ -- full open. The fuel passes
through the main jet 1 and mixes with air metered by the main air jet 2. The mixture passes by the clear-
ance between the needle jet 3 and jet needle 4, and then exits into the main bore after being metered by
the jet needle.
6) FLOAT CHAMBER
7) PILOT AIR JET
8) PILOT JET
9) PILOT AIR PASSAGE
FUEL AND LUBRICATION SYSTEM
AIR
VACUUM
FUEL
AIR
VACUUM
FUEL
4-7