Motorcycle Key and Lock Care: What Makers Recommend

Quick answerKeep water and grit out of the locks, use a small amount of a dry or lock-specific lubricant instead of oil, and replace a worn key before it fails. Harley-Davidson's owner's manuals warn against petroleum-based lubricants and graphite in barrel locks, Honda says to keep water off the ignition switch when washing, and lock makers such as ABUS, Kryptonite and Trelock all advise against oily sprays.

Which lubricant belongs in a motorcycle lock?

The makers agree on what to avoid more than on what to use. Oil and general-purpose sprays stay wet, collect dust and turn into a paste around the small sliding parts inside the cylinder. The table shows what each source actually says. If your owner's manual names a product for the locks, follow the manual first.

Source	What it says
Harley-Davidson owner's manuals	Do not lubricate barrel locks with petroleum-based lubricants or graphite; inoperative locks may result
ABUS	Products containing oil or graphite are not suitable for cylinders, because they can clog the mechanism, leave residue or turn to resin; treat cylinders twice a year with a lock care spray
Kryptonite	Recommends a dry lube, a few drops at a time, then working the lock several times; says standard WD-40 is a solvent that dissolves lubricant
Trelock	Do not use WD-40 or other oily sprays; use a moisture- and dirt-repellent lock spray or a dry lubricant made for locks, such as PTFE or silicone based

What about graphite?

Graphite powder is the traditional answer for house locks, and it is where the published advice splits. Harley-Davidson and ABUS rule it out for their locks. Some Kryptonite instructions allow a lubricant with a silicone, graphite or Teflon base. A motorcycle ignition is also an electrical switch sitting in the weather, so we side with the stricter advice: skip graphite in the ignition, and use a dry PTFE or silicone lock product sparingly. Never mix products. Graphite on top of old oil is the classic recipe for a gummed-up cylinder.

Washing, rain and salt air

Honda's guidance on washing says high-pressure water can damage moving parts and electrical parts, and lists the ignition switch first among the parts to keep water off, suggesting tape or a plastic bag as cover that you remove afterward. The Honda CRF230F owner's manual makes the same point, recommending against high-pressure spray and putting the ignition switch and the area under the seat on its list of places to avoid. The list varies by model, so check your own manual.

On the coast, salt does the rest. Kryptonite suggests servicing a lock about every two months as a starting point and more often in rain, snow and salt water. Trelock suggests every three to six months for normal use and every one to three months for beach, mud or frequent rain. For a motorcycle parked outdoors near the ocean in San Diego, Ventura or Santa Barbara, the shorter intervals are the sensible ones.

Rinse with a gentle hose, not a pressure washer, around the ignition, fuel cap and seat lock
Brush or blow sand out of the keyway before you put the key in
After washing or rain, work each lock a few times so water does not sit in the cylinder
Include the locks you rarely use: helmet holder, luggage and steering lock

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Looking after the key itself

A chip key is a small piece of electronics. Piaggio's manuals warn that violent shocks can damage the electronic parts inside a key, and Suzuki, Yamaha, KTM and BMW manuals for immobilizer models all warn that other immobilizer keys kept on the same ring or near the switch can interfere with reading and cause a no-start. For fobs, Harley-Davidson's owner's manuals say to replace the hands-free fob battery every year, and Indian recommends the same for its fobs.

Motorcycle makers do not generally publish a weight limit for a key ring, but the practical case for a light ring is clear: everything hanging from the key swings against the top clamp and tank while you ride, and the load is carried by the key blade and the cylinder. One key, one small tag and nothing else is a good rule.

Do not use the key as a pry bar, screwdriver or box opener
Keep a red, brown, orange or other master key off the daily ring and at home
Give your bike key its own ring, away from car keys with chips
Keep keys and fobs out of the wash and away from strong magnets

When should you replace a worn key?

Keys wear slowly, then fail quickly. Replace the key when the cuts look rounded, when the blade is bent or cracked, when the head is loose, or when it has started to need a wiggle in the fuel cap or seat lock. Those least-used locks are usually the first to complain.

How the new key is made matters. A copy traced from a worn key reproduces the wear, so you end up with two tired keys. A key cut to the factory code, from the key tag or decoded from a lock, is cut to the original dimensions. Honda, Suzuki, Yamaha and Triumph supply a key number tag or plate with new keys for exactly this purpose. If a fresh key cut to code still sticks, the wear is in the lock, and that is the time to have the cylinder serviced.

Quick questions

Can I spray WD-40 into my motorcycle ignition?

Lock makers advise against it. Kryptonite describes standard WD-40 as a solvent that dissolves lubricant, and Trelock says not to use it or other oily sprays in a lock.

How often should I lubricate the locks?

ABUS suggests twice a year for its cylinders, and Kryptonite and Trelock suggest more often in rain, salt water or beach conditions. For a bike kept outside near the coast, every couple of months is reasonable.

My key works in the ignition but not the gas cap. Is the key worn?

Possibly, but the cap lock is also the most exposed cylinder on the bike. Try a spare or a key cut to code first, and if that also sticks the cap lock needs cleaning or service.

Is it fine to copy a worn key?

It works for a while, but the copy carries the same wear. Having the key cut to its code gives you an original-spec key instead.

Services that can help

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Keep reading

Motorcycle Key Won't Turn in the Ignition? Causes and FixesWhen a motorcycle key will not turn, the usual causes are a steering lock under tension, a worn or bent key, worn wafers inside the ignition, dirt or corrosion in the cylinder, or simply the wrong key.
Motorcycle Gas Cap, Seat or Steering Lock Stuck? What to DoStuck gas cap, seat and steering locks on motorcycles usually come down to grime or corrosion in an exposed cylinder, a worn key, a stretched seat cable, or parts under tension that hold the latch closed.
When to Get a Spare Motorcycle Key, and Why NowGet a spare motorcycle key as soon as you are down to one working key.
How to Find Your Motorcycle Key CodeA motorcycle key code is a short number or letter-number code that tells a locksmith or dealer how to cut a key for your locks.
Broken Motorcycle Key in the Ignition: What to DoIf your key snaps in the motorcycle ignition, stop, keep both pieces, and do not try to turn the cylinder with the stub or dig the fragment out with a knife or screwdriver.

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Page last updated November 14, 2026.