Pilot Jet Set of 4 (Size #45). Jet Height 28mm, Outer Diameter 5.5mm.

Pilot Jets (your idle and low speed operation) are critical for smooth idling and lower rpm driving. When rebuilding carbs it is highly recommended to replace these pilot jets to ensure your bike is running as well as possible. Also, when installing new exhaust or high flow air filters it is recommended to increase the size of your Pilot Jets.

We list the stock Pilot Jet Sizes that came with the bikes below, you can use this list as a reference if you are trying to increase/decrease or keep the pilot jet size stock. We offer other sizes (above/below this part listing).

Honda CB750K (1969-76) – Stock Size 40,
CB750F (1975-76) Supersport – Stock Size 40

Honda CB500K (1971-73) – Stock Size 40,
CB550F (1975-77) Supersport – Stock Size 38,
CB550K (1974-76) – Stock Size 38

Honda CB350F (1972-74) Supersport – Stock Size Either 35 or 38,
CB400F (1975-77) Supersport – Stock Size Either 38, 40 or 42

Part Number: 48-3105