How to lock a helmet to your motorcycle

Why hang the helmet by the D-ring

Most full face and modular helmets use a double D-ring chin strap: two metal rings on one side that the strap threads through. The D-rings are strong, solid metal and the natural place to clip a lock. Hanging the helmet by the D-rings lets it hang upside down by the strap, with the shell protected and the liner untouched.

Other attachment points are worse. Looping a lock through the eye port can scratch the visor and pull on the visor mechanism. Clipping through the strap webbing alone makes it easy for a thief to cut the strap. Some helmets use a quick-release buckle instead of D-rings; in that case, clip through the metal part of the buckle or use a cable through the chin bar.

Note.Do not hang a helmet on a mirror. The mirror stem pushes into the EPS liner and can crush it, which reduces protection even if you cannot see the damage.

Method 1: the bike's built-in helmet lock

Many motorcycles have a helmet lock or helmet hook, often under the seat or on the frame near the passenger pegs. Some locks have a hook that opens with the ignition key; others have a cable stored under the seat. Your owner's manual shows where yours is and how it works.

1. 1

   Find the helmet lock or hook using the owner's manual.

2. 2

   Unlock it with the ignition key, or lift the seat to access an under-seat hook.

3. 3

   Hang the helmet by its D-ring on the hook.

4. 4

   Close and lock the hook or seat, making sure the strap is not pinched in a way that could cut it.

5. 5

   Check the helmet hangs clear of the exhaust, the wheel and the chain.

• Pros: always with the bike, no extra gear to carry.
• Cons: often positioned near the exhaust or rear wheel, and only holds one helmet.

Method 2: cable lock

A coated steel cable with a combination or key lock is flexible and versatile. You can run it through the D-rings of two helmets, a jacket sleeve, and around a solid part of the frame. A short cable fits easily under the seat or in a tank bag.

Cables can be cut with the right tools, so a cable lock is a deterrent against opportunistic theft rather than a determined thief. Choose a coated cable to avoid scratching paint and helmet shells. Thread it through the D-rings, around a fixed frame member or passenger peg bracket, and lock it so the helmet hangs on the side away from the exhaust.

Method 3: carabiner helmet locks

Carabiner-style helmet locks are compact locks with a hinged shackle like a climbing carabiner and a combination dial. You clip one end through the helmet's D-ring and the other around the bike's frame, a grab rail or the handlebar. They are fast to use and small enough to live on your key ring or in a jacket pocket.

Like cables, carabiner locks deter casual theft. Their main advantage is speed. Make sure the clip point on the bike is a solid frame part that cannot be unbolted easily, and that the helmet cannot swing into the paint or exhaust.

Store it inside: top case or under-seat storage

The most secure option is to lock the helmet inside a hard top case, or under the seat on scooters and some bikes with storage space. The helmet is out of the weather and out of sight. Many top cases are sized to hold a full face helmet; modular and adventure helmets with peaks may need a larger case.

If you tour with luggage, a top case that fits your helmet is a practical buy. Check the case maker's stated helmet capacity before relying on it. Leave the visor closed so it is not scratched.

Mistakes that damage helmets

A helmet hanging off the bike can be damaged even if no one steals it. Rain falls straight into an upside-down helmet hanging by its strap, soaking the liner. Wind can swing it against the frame or the paint. And a helmet touching a hot exhaust can melt the shell finish and the strap.

If your helmet falls off the bike from seat height onto a hard surface, inspect it carefully and consider whether it needs replacing; see when to replace a motorcycle helmet. Our storage guide covers keeping it in good shape at home.

• Never ride with a helmet hanging from the helmet lock. It can catch in the wheel or chain.
• Never hang a helmet on a mirror or lever.
• Keep the helmet clear of the exhaust and muffler.
• In rain, store it inside a case or carry it with you.
• Do not leave valuables like an intercom unit on an unattended helmet in busy areas.

See our modular helmet picks →

Frequently asked questions

How do I use the helmet lock on my motorcycle? Find it using the owner's manual, open it with the ignition key or under the seat, hang the helmet by its D-ring, and close the lock. Check the helmet hangs clear of the exhaust and wheel.

Can I hang my helmet on my mirror? It is best not to. The mirror can press into the EPS liner and crush it, reducing protection.

Are helmet locks secure? They deter opportunistic theft but can be defeated with tools. For expensive helmets, a locked top case or carrying it with you is safer.

Should I take my intercom off when I leave my helmet? On busy streets, it is wise. Units on magnetic or clip mounts, like Cardo's Air Mount, can be removed and carried; see our intercom guide.