Air Filter OEM-Style | Honda CB500K / CB550K / CB550F

Description

Air Filter (OEM-Style) | Honda CB500K / CB550K / CB550F

Running the stock airbox on your CB500 or CB550 four? This is the OEM-style replacement air filter — a direct factory-style fit that keeps your bike breathing right. Pick your model below.

Why You Need This

On the inline-four CB500 and CB550, the airbox feeds all four carbs, so a clean, correctly-shaped filter keeps the factory jetting working the way Honda set it up. This is a direct OEM-style replacement for the stock element. The CB500 uses its own unique filter; the CB550 came in two versions that differ only in the outlet hole size — the larger hole flows a little more air, the smaller hole restricts a little more.

Specifications

Spec	Detail
Fits Models	CB500K (1971–1973), CB550K (1974–1978), CB550F (1975–1977)
Sold As	Individually (one filter — choose your model)

Which filter for your bike:

• CB500K (1971–1973) — its own unique filter.
• CB550K / CB550F (1974–1977) — the large-hole filter.
• CB550 K3 & K4 (1977–1978) — the small-hole filter (more air restriction).

The two CB550 filters are interchangeable in a pinch — they differ only in outlet hole size — but the K3/K4 used the smaller hole from the factory. Choose your model at checkout.

Installation

Difficulty: Beginner

1. The airbox sits in a box behind the electronics. Open the airbox cover to reach the element.
2. Fit the new filter in place. Depending on the condition of your airbox, you may need to make sure the filter stays pressed firmly against the carb inlet manifold so it seals properly.

Keeping it clean: This is a paper element — clean it by tapping out the loose dust and blowing compressed air through from the inside. Don’t oil it.

Frequently Asked Questions

Which filter do I need — CB500 or CB550, large or small hole?

The CB500 (1971–1973) uses its own unique filter. The CB550K and CB550F from 1974–1977 used the large-hole filter; the CB550 K3 and K4 (1977–1978) used the small-hole filter, which restricts a little more air. They’re interchangeable in a pinch, but match your model and year at checkout.

Do these need to be oiled?

No. It’s a paper element, so clean it by tapping out the dust and blowing compressed air through from the inside — don’t oil it.

Do you sell the airbox too?

No — this is the replacement filter element, not the complete airbox.

What’s the difference between the large and small hole?

Just the outlet hole size: the larger hole flows a little more air, the smaller hole restricts a little more. The CB550 K3/K4 used the smaller hole from the factory.

You Might Also Need

• Air Filter Box to Carburetor Boots | CB500K / CB550K / CB550F — the boots that seal the airbox to the carbs; replace them if they’re cracked or hard
• Intake Boots (Carb-to-Engine) | CB550F / CB550K — the manifold boots, while you’re in the intake

Last updated: June 2026