2004-2006 Kawasaki 900 STX Jet Ski Service Manual, Page 57Get this manual
3-16 FUEL SYSTEM CarburetorFuel Pump
Carburetor Assembly
Install: Seat [A] and Screw [B] Valve
Main Jet [C] Pilot Jet [D] Gasket [E] Apply non-permanent locking agent to the check valve body screwsCheck Valve Cover [F] and Screws Spring [G] Float Arm [H] and Inlet Valve [I] Check Valve [J]
the vacuum piston holder [A] Install the washer [I], jet needle [B], holder spring [C] and Install washer [H] in the vacuum piston [D], and tighten the jet