Most stolen motorcycles are not defeated, they are lifted. Two people, a van, forty seconds, and the lock is still attached to the bike when it comes off the tailgate somewhere quieter. That single fact reorders every security decision you will make: an anchor beats a lock, a lock beats an alarm, and anything that stops the bike being carried away as an object is worth more than anything that makes it harder to ride away. Everything below follows from that.
Layers, in the order that actually matters
Security is cumulative and each layer buys time rather than certainty. Rank them by what they defeat.
- Ground anchor or an immovable fixing. The only layer that answers the lifting problem. A chain through a wheel and around nothing is a chain that travels with the bike. A chain through the frame and around a bolted-down anchor, a structural post or a purpose-built loop is a different object entirely.
- Chain and lock, rated and sized for the bike. Through the frame where possible, not just a wheel, and off the ground — a chain lying on concrete can be broken against the concrete, which is far easier than breaking it in the air.
- Cover. Cheap, and it removes the model, the condition and the fact there is a bike there at all. Thieves shop before they steal.
- Disc lock with a reminder cable. Good against the opportunist ride-away, useless against the van. Its real job is the two seconds it costs someone testing bikes in a row.
- Alarm and immobiliser. An immobiliser stops the bike being ridden. An audible alarm mostly buys attention, which is worth a lot in a shared car park and almost nothing on an empty industrial estate at three in the morning.
- Tracker. Recovery rather than prevention. Useful, but it works after the fact and its value depends entirely on the subscription being live and the unit being hidden and independently powered.
Two of those layers get bought in the wrong order more than any others. Riders buy an expensive chain and no anchor, and riders buy an alarm before a cover. Fix both before spending anything else.
How to read a security rating instead of the marketing
Lock and chain marketing is unusually noisy. Independent attack testing cuts through it. In the UK, Sold Secure publishes ratings within named categories — including a Powered Cycle category covering motorcycles — with tiers running Bronze, Silver, Gold and Diamond according to how long a product resists a defined toolset. The category matters as much as the tier: a Gold rating in a bicycle category is not the same test as a Gold rating in a motorcycle category, and products are frequently advertised as "Gold rated" without saying which. Check the rating against the product's actual listing, not the packaging.
Thatcham Research certifies aftermarket security products and factory-fitted systems and feeds security into the risk ratings insurers use, which is why a Thatcham-certified alarm or tracker can affect what an insurer will accept — and, more importantly, what your policy requires you to have fitted and in use. That last point is where riders get hurt. A policy condition to keep the bike chained to an anchor overnight is a condition, not a suggestion, and a claim can be refused when it is not met. The wider pattern of how that plays out is in the guide to why motorcycle insurance claims get refused.
Where you keep the bike is itself a rated thing. Secured by Design, the UK police-backed standards body, certifies physical security products and building specifications, and its guidance on doors, locks and secure parking is the sober reference for anyone deciding whether a garage door is a security measure or a piece of scenery. Most domestic up-and-over garage doors are the latter.
The three storage situations, and what each demands
| Situation | Main threat | Minimum worth having | What people skip |
|---|---|---|---|
| Locked private garage | Forced door, then unhurried work out of sight | Ground anchor, chain through frame, cover, door upgrade | Securing the door itself; anchoring inside because it "feels safe" |
| Driveway or front garden | Van lift, and surveillance before the theft | Anchor set into concrete, heavy chain off the ground, cover, lighting | The cover — the bike is advertised to everyone who passes |
| Street parking at home | Van lift, pattern learning | Chain to a fixed street feature where permitted, cover, tracker, varied position | Varying the spot; a bike in the same place nightly is a schedule |
| Workplace car park | Ride-away and daytime van lift | Disc lock, cover if practical, park in view of cameras and footfall | Treating a barrier and a camera as security rather than as evidence |
| Shared or underground residential park | Access by residents and their visitors; long unobserved periods | Anchor if the freeholder permits, chain, cover, alarm for the acoustics | Asking permission early — retrofitting an anchor later is often refused |
| Long layup, off the road | Slow deterioration plus theft from an unvisited location | All of the above plus a battery maintainer and off-road declaration | Telling the insurer the bike is off the road, then assuming it is still covered for theft |
The commuter case deserves a note. A bike parked in the same bay, five days a week, at the same times, is the easiest pattern in the world to learn, and it is learned by people who watch rather than by people who search. Vary the spot when you can, and treat consistent parking as the cost it is. Riders choosing a machine specifically for daily use will find the related trade-offs in the guide to choosing a commuting motorcycle.
Storage that protects the machine rather than the ownership
A bike that sits still degrades in predictable ways, and the ones that cost real money are all preventable.
- Battery. Standing discharge kills more motorcycle batteries than age does. A maintenance charger appropriate to the battery chemistry, connected through a permanent lead, is the single highest-value storage purchase. Lithium and lead-acid batteries need different chargers and the wrong one shortens the life of both.
- Tyres. Flat spots form when a loaded tyre sits in one position, and pressure falls over time regardless. Take the weight off with a stand, or move the bike every few weeks, and set pressures before the layup rather than after. The temperature effect that surprises people in spring is explained in the note on why pressures drop in cold weather.
- Fuel and the fuel system. Modern fuels degrade and ethanol-blended fuel absorbs moisture. Your owner's manual will state a position on storage, stabiliser and tank level — follow that rather than internet consensus, since carburettor and injection systems want different treatment.
- Moisture. A waterproof cover over a damp bike is a greenhouse. Cover a dry bike, in a ventilated space, and prefer a breathable cover indoors. Corrosion under a plastic sheet is a common and entirely self-inflicted repair.
- Fluids and seals. Brake fluid absorbs moisture on a calendar, not a mileage. A bike stored for a long period comes back needing fluid attention even though it has covered no distance.
If the layup is long enough to be a season rather than a fortnight, the decision has a cost side worth working through deliberately — insurance, tax status, storage fees and the spring recommissioning bill all interact, and that is the subject of the guide to winter layup costs and decisions.
The administrative half nobody enjoys
Three pieces of paperwork decide what happens after a theft, and all three are done in advance or not at all.
First, record the identity of the bike properly: frame number, engine number, key codes, and photographs of any distinguishing marks and of the whole machine from both sides. Property marking that ties components to you is worth doing on a bike likely to be broken for parts. Second, keep the ownership documents somewhere that is not the bike, the garage or the top box — a stolen bike plus its registration document is a far more sellable stolen bike, and the same applies to a spare key left in the seat unit. The document trail that establishes you are the owner is covered in transferring ownership. Third, if the bike is going off the road for a period, deal with its road status formally. In the UK that means a Statutory Off Road Notification through GOV.UK, which stops the tax liability — and note that it does not stop the bike being stolen, so tell your insurer separately what cover you still want. Riders who declare a bike off the road and cancel the policy entirely, then lose the machine from a garage, discover the gap at the worst moment.
On the practical side, a bike that goes untouched for weeks benefits from anything that tells you its state without a trip to the garage. Riders who keep an eye on tyre pressures through a sensor set such as a Bluetooth TPMS sensor pair get an early warning of a slow leak that would otherwise be found as a flat tyre in March.
Frequently asked questions
Is a ground anchor worth it if I have a locked garage?
Yes, and arguably more so. A garage removes witnesses. Once a door is open, an unanchored bike is a wheeled object in a private room, and the thief has as long as they want. The garage buys concealment; the anchor buys the time that concealment took away.
What size chain do I need for a motorcycle?
Buy on independent attack rating within the motorcycle category rather than on link diameter, then buy the heaviest one you will actually use every time. A rated chain left in the garage because it is awkward protects nothing, which is why many riders keep a heavy chain and anchor at home and a lighter rated one for away.
Does a cover really make a difference?
Out of proportion to its cost. It removes model identification, hides whether the bike is worth taking, and conceals whether it is locked. It also slows the approach, because a cover has to come off before anything else happens, and that is one more visible action in a public place.
Will fitting a tracker reduce what I pay to insure the bike?
Sometimes, usually only for a certified unit with an active subscription, and the answer differs by insurer and by machine. Ask your own insurer before buying, and treat any resulting condition as binding. Trackers are recovery tools rather than prevention, so do not let one displace the anchor and chain.
How should I store a motorcycle over winter?
Clean and fully dry, on a stand if you have one, under a breathable cover in a ventilated space, on a suitable maintenance charger, with fuel handled the way your owner's manual specifies and tyre pressures set before it sits. Then keep the security in place — an unvisited bike in a quiet garage is exactly the machine that goes missing unnoticed for a month.
