In this schematic the "Clamp D10.5 Fuel" is used most often.
Check out any of the seventeen Carburetor (tubing) components enlisted.
Parts such as the Carburetor (tubing): Hose Comp,water, Joint Set, Heater, Hose,water are included in the Gl1500c Valkyrie 2002 (2) England / Mkh Carburetor (tubing) parts fiche.