1999-2004 Suzuki King Quad LT-300 300F ATV Factory Service Manual, Page 323Get this manual
LTF300Y 300FY (2000MODEL)
CARBURETOR INSPECTION
Check the following items for any damage or clogging Valve seatPilot jetPiston valveMain jetStarter (enricher) jetMain air jetO-ringPilot air jetThrottle valveNeedle jet air bleeding holeDiaphragmFloatPilot outlet and by-pass portsNeedle valveJet needle NEEDLE VALVE INSPECTION if foreign matter is caught between the valve seat and the needle valve, the gasoline will continue flowing and overflowIf the valve seat and needle valve are worn beyond the permissible limits, similar trouble will occurConversely, if the needle valve sticks, the gasoline will not flow into the float chamberClean the float chamber and float parts with gaSOlineIf the needle valve is worn as shownreplace it along with new valve seatClean the fuel passage of the mixing chamber using compressed air