Flip-Up Gas Cap Seal | Honda Twins And Inline Fours

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Flip-Up Gas Cap Seal | Honda Twins And Inline Fours

Flip-Up Gas Cap Seal | Honda Twins And Inline Fours

Original price was: $8.00.Current price is: $4.42.

94 in stock

SKU: 6009 Category:

Description

Flip-Up Gas Cap Seal | Honda Twins and Inline Fours

The rubber seal inside your flip-up gas cap shrinks, cracks, and goes brittle over time — even when it still looks OK from the outside. Once it fails, fuel leaks out around the cap and onto your paint. This OEM-spec replacement seal fits all 1970s-era Honda twins and inline fours equipped with flip-up gas caps.

Why You Need This

A degraded gas cap seal lets fuel seep past the cap every time you ride, staining your paint and wasting gas. The rubber hardens with age and loses its ability to conform to the filler neck opening. Even seals that look fine on the surface can be completely brittle underneath — the moment you try to remove one, it crumbles apart.

This replacement seal is made to OEM specifications and restores a tight, leak-free fit to your flip-up gas cap.

Specifications

Spec Detail
Replaces OEM Part Numbers 17534-323-300, 17525-300-000
Fits Models CB200 (1973–1976), CL200 (1974), CB350 K3–K5 (1971–1973), CL350 K3–K5 (1971–1973), SL350 K2 (1972–1973), CB350F (1972–1974), CB360 (1974–1976), CL360 K0–K1 (1974–1975), CB450 K3–K7 (1970–1974), CL450 K3–K6 (1970–1974), CB500T (1975–1976), CB500 K0–K2 (1971–1973), CB550 K0–K2 (1974–1976), CB550F (1975–1976), CB750 K2–K5 (1972–1975), CB750F0–F1 (1975–1976), CB750A (1976)
Sold As Individual seal
Material Rubber

Note: This gas cap seal only fits bikes equipped with flip-up gas caps and those with recessed fuel caps covered by fuel doors like the later CB750s. It does NOT fit early bikes with screw-in gas caps or CB175s. Specifically, the CB175, CL175, CB350 K0–K2, CL350 K0–K2, SL350 K0–K1, and CB450 K0–K2 all used screw-in caps and require a different seal.

Installation

Difficulty: Beginner

  1. Pry out or peel off the old seal from the stopper inside your gas cap. The old rubber may look intact but will likely crumble once you start removing it.
  2. Clean any corrosion or rust off the gas cap stopper with a wire brush.
  3. Carefully stretch the new seal over the circumference of the stopper. The seal has a thick side and a thin side — install it so the thin side faces up toward the inside of the cap. When the cap is closed, the thicker side of the ring should face the opening of the gas tank.
  4. Work the seal evenly around the full circumference. This takes more time than you would expect to get it seated evenly.

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