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.
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.
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.
Difficulty: Beginner
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.
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.
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.
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.
Last updated: June 2026
