Latch for Honda Flip Top Gas Cap

Description

Latch for Honda Flip Top Gas Cap

Broken gas cap latch? Can’t keep your fuel cap closed while riding? This replacement latch fits the flip-top style gas cap used on most vintage Honda twins and inline fours from the late 1960s through the mid-1970s.

Why You Need This

The flip-top gas cap latch takes a beating — decades of opening and closing eventually wears out the spring, bends the catch, or snaps the hinge entirely. A broken latch means your gas cap flops open while riding, spilling fuel onto your tank and down your leg. Not a great look, and a fire hazard to boot.

Our replacement latch installs with a hinge shaft and circlip — much easier to service in the future than the original factory rivet. One latch per gas cap.

Specifications

Spec	Detail
Replaces OEM Part Numbers	17513-300-300, 17515-300-300, 17517-300-340, 17550-377-315
Fits Models	CB200 K0 / CB200T / CL200 (1973–1976), CB350 K3–K5 (1971–1973), CL350 K3–K5 (1971–1973), SL350 K0–K2 (1969–1972), CB360G/T (1974–1976), CL360 (1974–1975), CB450 K3–K7 (1970–1974), CL450 K3–K6 (1970–1974), CB500T (1975–1976), CB500 K0–K2 (1971–1973), CB550 K0–K1 / CB550K (1974–1976), CB750 K0–K6 (1969–1976)
Sold As	Individually — one latch per gas cap

Does NOT fit: Honda CB175, CL175, SL175, CB350 K0–K2, CL350 K0–K2, CB450 K0–K2, or CL450 K0–K2 — those earlier models use a twist-on style gas cap with no latch. Also does not fit the CT90 or any model with a hinged (non-flip-top) cap.

Installation

Difficulty: Beginner

1. Remove the old latch — Use a very small punch to tap out the retaining pin from the hinge. The original factory latch uses a long rivet — you’ll need to drive it all the way through.
2. Install the new latch — Align the new latch with the hinge holes on the gas cap. Insert the hinge shaft and secure with the included circlip.
3. Lubricate — Apply a small amount of light oil or grease to the hinge and latch mechanism. This prevents the latch from jamming over time.

Stuck pin tip: If the original rivet won’t budge, try penetrating oil and let it soak before tapping. Don’t use a nail as a punch — use a proper pin punch to avoid bending or breaking your tool.

Frequently Asked Questions

Does this fit a CB350 K0 or K1?

No. The CB350 K0, K1, and K2 (and CL350 K0–K2) use a twist-on style gas cap — there’s no latch on those models. The flip-top cap with latch started on the CB350 K3 (1971).

What’s the difference between this latch and the locking latch?

This is a standard thumb-release latch. We also sell a locking version that uses a key — handy if you park your bike in public and want to prevent fuel theft or tampering.

I can’t get the original pin out — any tips?

The factory rivet can be stubborn after 50 years. Use penetrating oil, let it soak, and drive it out with a proper pin punch — not a nail. If it still won’t move, a small drill bit can help loosen the rivet before punching.

Will this fit a CB750?

Yes — it fits the CB750 K0 through K6 (1969–1976). All of those models use the same flip-top gas cap design.

You Might Also Need

• Flip-Up Gas Cap Seal — replace the rubber seal while the cap is apart
• Flip Top-Style Gas Cap — full replacement if your entire cap is damaged
• Locking Flip-Top Gas Cap Latch — keyed latch for added security

Last updated: June 2026