Honda's sweetest SOHC four cylinder engine, the 350F and 400F love revs, and need their carburation to be spot on. Old brittle carburetor insulators will start to transfer too much heat and vibration from the head to the carburetor body, spoiling the fuel atomization. A set of new insulators, not only make the engine look prettier, they will restore the smoothness that was the hallmark of these bikes when first introduced in 1973(350) and 1974 (400). Check our online catalogue and 'parts list' fiche for the many other NOS and OEM parts stocked here at CMS for these delightful little Fours.
Suited for models:
