In this schematic the "Clip,brthr Tube" is used most often.
The component with the lowest price in the THROTTLE BODY schematic is the Tube,3.5x50mm.
Parts such as the Throttle Body: Joint,4way, O-ring,7.47x3.6, Motor Assy, O Ring are included in the Cb1300 2008 (8) Singapore Throttle Body parts fiche.