2007-2010 Kawasaki Ultra 250X/260X/260LX PWC Factory Service Manual, Page 123Get this manual
3-64 FUEL SYSTEM (OFI) Fuel Injectors
Injector Fuel Line Inspection
Check the injector fuel line for leakage as followsOConnect commercially available vacuumpressure pump [A] to the supply joint of the delivery pipe [8] with the fuel hose [C] (supply ends connected with the clamp [0]) as shown OApply soap and water solution to the areas [E] as shown OWatching the pressure gauge, squeeze the pump lever [H], and build up the pressure until the pressure reaches the maximum pressureFuel Line Maximum Pressure Standard: 300 kPa (3.06 kgfcm44 psi)
CAUTION
During pressure testingdo not exceed the maximum pressure for which the system is designedOWatch the gauge for at least seconds If the pressure holds steady, the system is goodIf the pressure drops at onceor if bubbles are found in the area, the line is leaking Replace the delivery pipeinjectors and related parts Repeat the leak test, and check the fuel line for no leakage Run the hoses correctly (see Cable, Wireand Hose Routing section in Appendix chapter) -c