Original Honda Part No. was "17210-KY2-700", sadly no longer available from Honda or anywhere else.
Fuel Inlet Tee Piece Honda CBR400 NC23 86-89 Tri-Arm Fuel T Pipe Carb O Rings
Thermostat Kit Honda CBR400 NC23 NC29 Gull-Arm Tri-Arm OEM Part O Ring Cooling
Honda CBR400 NC23 NC29 Thermostat And Sealing O Ring Cooling 19300-ML7-003
Radiator Grille Guard Cooler For Honda CBR400 NC23 1988-1991 Black UK
Honda CBR400 NC23 Tri Arm Quick Release Fuel Line Connector Coupler - 8mm
Honda CBR400 NC23 NC29 In Line Fuel Filter Cartridge 16900MG8003