Insulator Set - Honda CB350F CB400F

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Set of 4 reproduction rubber intake insulators and 4 air box adapters. For use with the stock carburetors on Honda CB350F and CB400F. 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 your air/fuel mixture.

Comes with the o-rings to seal the manifolds to the cylinder block. Does not come with hose clamps, but we have them available separately, pick up 8 and you're ready to go!

Dimensions for the Intake Insulators (engine side):

Inner Diameter: Attaches to the Carb: 27mm Attaches to the engine: 24mm
Outer Diameter: 42mm
Overall Length: 31.5mm
Distance between mounting holes: 50.5mm (2") Measured from the center of each hole.

Replaces Honda Part Number: 16212-333-030 , 16213-333-030 (intake insulators)

Fits Honda:

CB350F Four - 1972-1974
CB400F Super Sport - 1975-1977

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  • 5
    Direct Replacement

    Posted by Bob K on 4th May 2020

    I’ve had bad luck with carb air and fuel intake boots on other bikes so I was a little hesitant to pull the trigger. I’m very happy with the quality of this set. Fits perfect for my ‘74 Cb350f project!! I would definitely buy again!!