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.
Replaces Honda Part Numbers: 16211-405-000, 16212-405-000, 16213-405-000, 16214-405-000
CB750K - 1977-1978
Can Fit Honda:
CB750F Super Sport - 1977-1978 (Note: Shorter than original insulators and cannot be used with original air box due to this.)