Reproduction intake insulator set for the 1977-1978 CB750K. This set is for the carburetor to engine side. If you've discovered cracks on your stock intake boots, it's time to replace them because they're most likely leaking air which leans out the air/fuel mixture.
Note: Each insulator is stamped with a number which corresponds to the cylinder it goes to. Make note of the orientation of the stock insulators before removing them and lay out these reproductions in the same orientation prior to install.
Replaces Honda Part Numbers: 16211-405-000, 16212-405-000, 16213-405-000, 16214-405-000
CB750K - 1977-1978
CB750F Super Sport - 1977-1978 (Note: Shorter than original insulators and cannot be used with original air box due to this.)