2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 170Get this manual

2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 170

1G-3 Fuel System: Fuel Valve When the engine is not operating, the fuel valve (1) is kept closed by the tension of the spring
(vacuum) "A" is generated in the combustion chamber and reaches the diaphragm through passage in the carburetor's main bore
and the vacuum hoseThis negative pressure (vacuum) "A" is higher than the spring pressure which causes the diaphragm to force