2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 172Get this manual
1G-5 Fuel System: Slow System This system supplies fuel during engine operation when the throttle valve (1) is closed or slightly openedThe fuel from the float chamber (2) is metered by the slow jet (3) where it mixes with air coming in through the slow air jet (4)This mixture, rich with fuel, then goes up through the 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 4