2006-2009 Suzuki LT-R450 Service Manual, Page 197Get this manual
FUEL SYSTEM AND THROTTLE BODY
Connect proper lead wire into the fuel pump lead wire coupler (fuel pump side) and apply 12 volts to the fuel pump (between terminal and terminalfor 10 seconds and measure the amount of fuel dischargedBattery c) terminal terminal (OG wire) Battery terminal- terminal (BIW wire) If the pump does not discharge the amount specified, it means that the fuel pump or fuel pressure regulator is defective or that the fuel filter is clogged