Honda Locking Flip-Top Gas Cap Latch

Description

Locking Tank Latch | Honda Flip-Top Gas Caps

Want to lock the fuel cap on your vintage Honda? This keyed locking latch replaces the standard thumb latch on the flip-top gas cap, holding the cap shut against the tank. If your original locking latch is broken or seized, or you want to add a lock to a cap that has the standard latch, this is an OEM-style replacement.

Why You Need This

A locking latch keeps the flip-top cap closed and keyed shut — handy if you park in public and want to discourage fuel theft or tampering. Be realistic about what it is, though: the lock isn’t cut to a unique key code, so most any Honda key will open it. It’s a deterrent against casual tampering, not true security.

Specifications

Spec	Detail
Style	Locking (keyed) thumb latch, OEM-style
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 original thumb latch — tap out its retaining pin with a very small punch.
2. Mount the new locking latch with its thin screw. Put a little anti-seize on the threads so it can be removed easily in the future.
3. Keep the lock and latch lubricated so they don’t jam over time.

Frequently Asked Questions

Is the lock keyed to a unique key?

No. The lock isn’t cut to a unique code, so most any Honda key will open it. Think of it as a deterrent against casual tampering rather than true security.

How do I install it?

Tap out the retaining pin on your original thumb latch with a very small punch to remove it, then mount the locking latch with its thin screw. Put a little anti-seize on the threads so it backs out easily later, and keep the lock lubricated so it doesn’t jam.

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

This one locks with a key; the standard thumb latch doesn’t. They fit the same flip-top caps, so it’s an easy upgrade either way.

My new latch won’t catch — what’s wrong?

Usually the cap isn’t closing all the way down. The latch can only lock when the cap seats flush against the tank, so check that your gas cap seal is seated correctly and not holding the cap up.

You Might Also Need

• Standard Flip-Top Gas Cap Latch — the non-locking thumb latch
• Flip-Top Gas Cap — full replacement if your cap is damaged
• Flip-Up Gas Cap Seal — so the cap seats and latches properly
• Front Tank Mounts | Honda CB350 / CB360 — replace perished rubber tank mounts
• Front Tank Mounts | Honda CB450 / CB500T / CB550 — replace perished rubber tank mounts

Last updated: June 2026