Honda 16154-300-004 Carburetor Dust Cap

The Honda 16154-300-004 is a genuine OEM factory replacement dust cap designed for the carburetor slider joint linkage on Honda CB750 series motorcycles. This rubber boot seals the carburetor throttle shaft linkage against dust and moisture ingress, ensuring consistent throttle response and preventing premature wear of the carburetor bore and throttle plate. Constructed from fuel-resistant elastomer compound, the cap withstands engine bay heat cycles and fuel vapor exposure. It installs directly onto the carburetor body linkage arm without modification. Each motorcycle requires four units (one per carburetor). This part supersedes earlier part number formats and is referenced as 16154300004 or HN-16154-300-004 in parts catalogs.