Suzuki DR650SE - Fuel System

4·1 FUEL AND LUBRICATION SYSTEM
FUEL SYSTEM
When turning starter motor, negative pressure is generated in the combustion chamber. This nega-
tive pressure works on the diaphragm of fuel valve through passage way provided in the carburetor
main bore and vacuum hose, and diaphragm builds up a negative pressure which is higher than the
spring pressure. Valve in the fuel valve is forced to open due to diaphragm operation, and thus al-
lows fuel to flow into carburetor float chamber.
Fuel tank
l::::::::I----Vacuum hose
Fuel hose----I'::::::::::I
vacuum~
Fuel •