2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 239Get this manual
1G-2 Fuel System:
General Description
Fuel System Description
Fuel system The fuel delivery system consists of the fuel tank (1), fuel valve (2), fuel pump (3), fuel filter (4), fuel feed hoses (6) and (7), fuel delivery pipe (8), fuel injector (9), fuel pressure regulator (11)The fuel is pumped up by the fuel pump and pressurized fuel flows into the injector installed in the fuel delivery pipeFuel pressure is regulated by the fuel pressure regulator in the fuel valveAs the fuel pressure applied to the fuel injector (the fuel pressure in the fuel delivery pipe) is always kept at absolute fuel pressure of approx294 kPa (2.9 kgfcm2, 41 psi), the fuel is injected into the throttle body in conic dispersion when the injector opens according to the injection signal from the ECMThe fuel relieved by the fuel pressure regulator flows back to the fuel tankB933H21701001