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How we chose: this guide is research-based, built from manufacturer specifications, safety certifications and owner feedback rather than hands-on testing. How we research.
The best motorcycle alarm system for most riders in 2026 is the Scorpio SRX-900, a wired alarm with a 120 dB siren, impact and tilt sensing, and a pager remote that alerts you up to half a mile away. If you want to find your bike after it’s taken, add a GPS tracker like the Monimoto M9, and if you need security you can carry, an alarm disc lock such as the Xena XX-6 or ABUS Granit 8008 3D is the quickest win. Touring riders can combine the Monimoto and a compact alarm disc lock into a portable security system that needs no wiring.
Quick picks
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Best budget GPS alerts
Scorpio Rlink GPS Tracking and Notification System
- Type
- GPS tracker
- Siren
- None
- Price
- $$
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Best high-security alarm disc lock
ABUS Granit 8008 3D Alarm Disc Lock
- Type
- Alarm disc lock
- Siren
- 100 dB
- Price
- $$$$
- Best compact alarm disc lock: Xena XX-6 Disc Lock with Alarm
- Loudest budget disc lock: Kryptonite Kryptolok 6A Alarm Disc Lock
- Best heavy-duty disc lock: Oxford Boss Alarm Disc Lock
- Best for scooters and lighter bikes: ABUS Trigger Alarm 2.0 365
- Best cheap alarm disc lock: Kryptonite Keeper Alarm Disc Lock
- Best alarmed chain: Stockton 736 Alarmed Security Chain and Lock
Motorcycles are easy to steal. A couple of people can lift most bikes into a van in under a minute, and steering locks don’t slow down anyone who knows what they’re doing. The US National Insurance Crime Bureau tracks tens of thousands of motorcycle thefts every year in its theft reports, and recovery rates are low. An alarm won’t make your bike impossible to steal, but noise, alerts and tracking make it a much worse target than the bike parked next to it. This guide covers the three main types of motorcycle alarm, the best current options in each, and how to layer them.
Motorcycle alarm comparison
| Alarm | Type | Siren | Key feature | Price |
|---|---|---|---|---|
| Scorpio SRX-900 | Wired alarm | 120 dB | Pager remote, auto-arming | $$$ |
| Monimoto M9 | GPS tracker | None | Phone call alert, app tracking | $$$ |
| Scorpio Rlink | GPS tracker | None | Text and push alerts, geofences | $$ |
| ABUS Granit 8008 3D | Alarm disc lock | 100 dB | ABUS Level 19, 16mm bolt | $$$$ |
| Xena XX-6 | Alarm disc lock | 120 dB | Self-arming, compact | $$ |
| Kryptonite Kryptolok 6A | Alarm disc lock | 120 dB | Theft protection offer | $$ |
| Oxford Boss | Alarm disc lock | Yes | 14mm shackle, double locking | $$ |
| ABUS Trigger Alarm 2.0 365 | Alarm disc lock | 100 dB | ABUS Level 8, light | $$ |
| Kryptonite Keeper Alarm | Alarm disc lock | 100 dB | IPX7 module, cheap | $ |
| Stockton 736 | Alarmed chain | 110 dB | 10mm hardened chain | $ |
The three types of motorcycle alarm
Wired alarms connect to your bike’s battery and ignition. They sense impact, tilt or ignition tampering and sound a loud siren. Better ones have a remote that tells you when the alarm goes off. They’re always on the bike, so you can’t forget them.
GPS trackers don’t stop a theft in progress, but they tell your phone when the bike moves and show where it’s going. That’s what gets bikes back. Most need a subscription for mobile data.
Alarm disc locks clamp through a brake rotor so the wheel can’t turn, and they scream if someone knocks or moves the bike. They’re portable, cheap and great on the road, but they only work when you remember to fit them, and you have to remember to take them off.
The best setup combines at least two: something loud to scare off the opportunist and something trackable to recover the bike if a pro takes it anyway.
The best motorcycle alarm systems in 2026
Every pick below is a current product from an established security brand. Prices move, so we use tiers; check today’s price with the buttons under each one.
Wired alarms and GPS trackers
1. Scorpio SRX-900 Security System: best for most riders
Scorpio has been making motorcycle-specific alarms for a long time, and the SRX-900 is the one we’d put on most bikes. It’s designed to fit just about any 12V motorcycle, and installation is simpler than most wired alarms: three wires, one to each battery terminal and one to a 12V switched wire. Scorpio includes a tap-style connector for that last wire, so you don’t need to cut and solder.
Day to day it’s easy to live with. The remote uses RFID, so when you walk up to the bike the system detects the remote and disarms itself. Walk away, and once the remote is out of range (about 2 to 3 feet) it rearms automatically. No fumbling for buttons with gloves on, and no forgetting to arm it.
Sensing comes from a dual-axis accelerometer that detects both impacts and changes of angle, so it catches someone trying to lift the bike onto a trailer as well as someone kicking it. Because it reads angles rather than relying on one mounting position, you can tuck the module almost anywhere. When it trips, the 120 dB multi-tone siren goes off and every paired remote within about half a mile is notified. That pager function is what separates it from cheap sirens: you know something’s happening even if you’re inside a restaurant or asleep upstairs.
Scorpio also lists a smart battery safeguard with a sleep mode and says the SRX-900 draws less than half the power of earlier versions, which matters if your bike sits for days. Optional extras include a multi-stage perimeter sensor that detects people approaching the bike, and an ignition disabler that prevents hot-wiring.
Pros
- 120 dB siren plus pager alerts up to about half a mile
- Auto arming and disarming with RFID remote
- Detects impact and tilt (lifting)
- Simple three-wire install
- Expandable with perimeter sensor and immobilizer
Cons
- No GPS tracking on its own
- Wired install takes some time
- Optional extras add cost
2. Monimoto M9 GPS Anti-Theft Tracker: best for finding your bike after a theft
If a pro wants your bike, a siren won’t always stop them. That’s where a tracker earns its keep, and the Monimoto M9 is one of the easiest to live with. It doesn’t wire into the bike at all. It runs on a rechargeable battery that Monimoto rates at up to a year, so you hide it somewhere on the frame with the supplied releasable zip ties and forget about it.
It arms when the paired key fob moves away and disarms when the fob comes back, so there’s no app to open before you ride. If the tracker detects movement without the fob nearby, it calls your phone within a minute. A call is harder to sleep through than a push notification. From there the app updates the bike’s location every five minutes, which is what you hand to the police.
The M9 is smaller and lighter than the older M7, and because it isn’t wired, you can move it between bikes or even to a trailer or equipment box. You’ll need a Monimoto service plan for the mobile connection, so factor that into the cost. Check the current plan pricing before you buy.
Pros
- Calls your phone within a minute of movement
- No wiring, easy to hide and move
- Long rechargeable battery life
- Automatic arming with key fob
Cons
- Needs a service plan
- No siren to scare thieves off
- Five-minute location updates, not live tracking
3. Scorpio Rlink GPS Tracking and Notification System: best for budget GPS alerts
The Scorpio Rlink is a cheaper way into GPS tracking. It wires to the bike with just two connections and sends instant alerts to your phone by text or push notification if someone messes with or moves the bike. The Rlink app for iOS and Android shows the bike’s location, ride history and battery level.
It has some genuinely useful extras. You can set custom geofences that send automatic text notifications to any contact when the bike enters or leaves an area, rides are recorded automatically and can be exported as GPX files, and you control which alerts you get. It’s wired to the bike’s battery, so there’s no tracker battery to charge, though it also means a thief who finds it can cut the power.
Pair the Rlink with a siren-based alarm or an alarm disc lock and you’ve got both deterrence and recovery at a reasonable price. Check Scorpio’s current service plan costs before you buy.
Pros
- Lower price than most trackers
- Text and push alerts
- Geofences and ride history
- Simple two-wire install
Cons
- Needs a service plan
- No siren
- Wired power can be cut if found
Alarm disc locks
4. ABUS Granit 8008 3D Alarm Disc Lock: best for maximum lock strength
The Granit 8008 3D is the toughest alarm disc lock on this list. ABUS gives it a Level 19 rating on its own security scale, which runs up to 20, and it uses a thick 16mm double-locking bolt made from specially tempered hardened steel. Bolts that thick take serious tools and time to defeat.
The alarm uses 3D motion sensing, so it reacts to the bike being moved, not just knocked, and it lets out a 100 dB alert. The XPlus key cylinder is designed to resist picking and can be keyed alike with other ABUS X-Plus motorcycle locks, so one key can run your disc lock and chain. It runs on a CR2 battery and gives audible signals for battery and lock status.
It’s the most expensive disc lock here and it’s heavier than the compact options, but if your bike sits outside overnight, this is the one we’d want on the rotor. Just check the 16mm bolt fits your rotor holes before you buy.
Pros
- ABUS Level 19 security
- 16mm double-locking hardened bolt
- 3D motion-sensing alarm
- Can be keyed alike with other ABUS X-Plus locks
Cons
- Expensive
- Heavier than compact disc locks
- Thick bolt won’t fit every rotor
5. Xena XX-6 Disc Lock with Alarm: best for a compact everyday lock
Xena more or less invented the alarm disc lock, and the XX-6 is the small, easy one to carry. It’s built from a high-grade mono-block alloy with a stainless body and a 6mm hardened steel pushdown locking pin. The key and barrel are designed to resist picking and freeze-spray attacks.
The alarm is properly loud: shock and motion sensors trigger a 120 dB siren, powered by a single long-life CR2 lithium battery. There’s no on-off switch; the lock arms itself and resets to armed mode within 15 seconds of any disturbance. All the electronics live in a replaceable module you can swap without tools.
With a 42mm throat and a 6mm pin, it’s ideal for smaller bikes and scooters and fits most rotors. It’s small enough for a jacket pocket or tank bag, which is exactly why it gets used.
Pros
- 120 dB siren
- Self-arming, nothing to switch on
- Small enough to carry every ride
- Replaceable alarm module
Cons
- 6mm pin is lighter-duty than big locks
- Best suited to smaller bikes and scooters
6. Kryptonite Kryptolok 6A Alarm Disc Lock: best for a loud lock on a budget
The Kryptolok 6A gives you a 120 dB alarm, as loud as anything here, for a mid-range price. It has a zinc die-cast body, a 6mm locking pin, and a weatherproof electronics module that’s fully protected. It runs on a replaceable high-capacity 900mAh CR2 battery for long life between changes.
The bonus is Kryptonite’s Key Safe program and its optional Anti-Theft Protection Offer. On eligible locks, you can buy a one- or two-year plan for theft coverage; check the current terms and eligibility on Kryptonite’s site. Note that Kryptonite only ships these to US addresses through RevZilla.
Pros
- 120 dB alarm
- Weatherproof electronics module
- Long-life replaceable battery
- Optional theft protection offer
Cons
- Zinc body isn’t as tough as hardened steel
- US shipping only
7. Oxford Boss Alarm Disc Lock: best for heavy-duty protection at a fair price
Oxford calls the Boss its strongest disc lock, and the numbers back it up: a 14mm diameter shackle, 42mm wide and 75mm long, with a double-locking mechanism. Oxford says it’s been 5-minute attack tested and 5-year life-cycle tested.
The alarm sits in a removable, sealed module that’s rated water, vibration, frost and heat proof, and the batteries are included. It’s a good middle ground between compact locks like the Xena and the ABUS Granit: much beefier than a 6mm pin, without the top-tier price.
The thick shackle needs a matching hole in your rotor, so measure before you buy. Riders with large sport bikes or touring bikes usually have no trouble.
Pros
- 14mm shackle, double locking
- Sealed, removable alarm module
- Attack and life-cycle tested by Oxford
- Good value for the strength
Cons
- Heavy to carry
- Thick shackle won’t fit small rotor holes
8. ABUS Trigger Alarm 2.0 365 Disc Lock: best for scooters and lighter bikes
The Trigger Alarm 2.0 is ABUS’s lighter-weight alarm disc lock. It’s rated Level 8 on the ABUS scale and uses a 5mm push-to-close bolt in tempered hardened steel. A T-bolt design anchors the bolt into the lock body after locking, so the lock can’t be spread apart.
A vibration sensor triggers a 100 dB siren, and you can deactivate the alarm with the key beforehand, handy when you’re moving the bike in a garage. The Z key is pick-resistant and replaceable, and like the Granit it runs on a CR2 battery with audible status signals.
Its small 5mm bolt fits the tight rotor holes on scooters, small-capacity bikes and many sport bikes. It’s a good second lock, or a main lock for short stops in busy places.
Pros
- Light and easy to carry
- Fits small rotor holes
- Pick-resistant, replaceable key
- Can switch the alarm off with the key
Cons
- Level 8 isn’t top-tier security
- 100 dB is quieter than the loudest options
9. Kryptonite Keeper Alarm Disc Lock: best for the cheapest worthwhile alarm lock
If you just want an alarmed lock for quick stops without spending much, the Keeper Alarm is a smart buy. Kryptonite gives it a 5/10 security rating. It’s a stapler-style lock that immobilizes the wheel to stop roll-away or ride-away theft, with a 5.5mm pin that fits smaller vent holes and rotors up to 7mm thick.
The built-in alarm is rated at 100 dB, and the electronics module is IPX7 waterproof. Kryptonite estimates around a year of battery life from the replaceable 900mAh CR2 cell. It’s compact and light at just under a pound, and it’s eligible for Kryptonite’s theft protection offer.
Pros
- Low price
- Compact and light
- IPX7 waterproof electronics
- Fits small rotor holes
Cons
- Mid-level security rating
- Quieter than 120 dB locks
Alarmed chains
10. Stockton 736 Alarmed Security Chain and Lock: best for locking to something solid
A disc lock stops the wheel turning, but it doesn’t stop the bike being lifted into a van. A chain to a ground anchor, lamp post or another bike does. The Stockton 736 adds a 110 dB siren to a 4-foot chain of 10mm hardened steel square links, with a protective nylon cover to save your paint and an integrated anti-pick lock.
It’s an affordable way to get both a physical tether and a noise deterrent. It’s not a match for the heaviest chains on the market, so for overnight street parking we’d pair it with a disc lock or a wired alarm. Two CR2032 batteries come in the box.
Pros
- Ties the bike to something solid
- 110 dB siren
- Nylon cover protects paint
- Affordable
Cons
- 10mm links aren’t top-tier
- Heavy and bulky to carry
How to choose a motorcycle alarm
Decide what you’re protecting against
Most thefts are either opportunists, who’ll be put off by noise and a visible lock, or organized thieves, who’ll lift a bike into a van regardless. A siren and a disc lock deal with the first. A hidden GPS tracker is your best chance against the second. Where you park matters too: a locked garage needs less than a street, an apartment lot or a motel parking lot on a road trip.
Loudness
Sirens on this list range from 100 to 120 dB. Every 10 dB is a big jump in perceived loudness, so a 120 dB siren is much harder to ignore than a 100 dB one. Louder is better for scaring off thieves and getting attention from passers-by.
Alerts that reach you
A siren only helps if someone reacts. Pager remotes (like the SRX-900’s), phone calls (Monimoto) and push or text alerts (Rlink) tell you something’s happening. If your bike is ever out of earshot, prioritize alerts.
Sensors and false alarms
Look for sensors that tell the difference between a passing truck and someone lifting the bike. Tilt and motion sensing (accelerometers) are more useful than simple shock sensors. Adjustable sensitivity helps if you park on busy streets.
Power and battery drain
Wired alarms and trackers draw a small current from your battery all the time. A modern low-drain alarm is fine for daily riders, but if your bike sits for weeks, connect a battery tender. See our best motorcycle battery guide and how to winterize a motorcycle for storage tips. Battery-powered trackers and disc locks avoid the issue but need charging or battery swaps.
Installation
Disc locks need no installation. Battery trackers like the Monimoto just need a hiding place. Wired alarms take an hour or two for a confident home mechanic; if you’re not comfortable working on your bike’s electrics, have a shop do it. Our guide on how to maintain a motorcycle covers the basic tools.
Subscription costs
GPS trackers need a mobile connection, which usually means a monthly or yearly plan. Add that to the purchase price when comparing. Sirens and disc locks have no ongoing cost beyond batteries.
Disc lock fit
Check the lock’s pin or bolt diameter against the holes in your brake rotor, and its throat width against the rotor’s thickness and the caliper position. Thick bolts (14 to 16mm) are stronger but won’t fit small, closely spaced holes.
Security ratings and insurance
Brands like ABUS and Kryptonite publish their own security ratings, which are useful for comparing locks within a brand. Some insurers offer discounts for approved alarms, trackers or locks, so ask yours before you buy.
Layer your motorcycle security
No single device stops every thief. The riders who keep their bikes layer their defenses:
- Deterrence: a visible alarm disc lock and a disc lock reminder cable so you don’t ride off with it fitted.
- Detection: a wired alarm with a pager, or a tracker that calls your phone.
- Recovery: a hidden GPS tracker, tucked somewhere a thief won’t find in a hurry.
- Physical barriers: a chain to a ground anchor at home, and a cover so thieves can’t see what’s underneath. A portable motorcycle garage is great if you don’t have a real one.
Small habits help too. Park in well-lit spots, near cameras, and close to other bikes you can lock to. A motorcycle camera with parking mode can record what happens if someone does have a go, and a wheel chock keeps the bike upright and harder to roll at home. Note your VIN and keep photos of your bike so you can report it quickly.
Portable security systems for touring bikes
The best portable security system for a touring bike is a layered kit you can carry: a self-contained GPS tracker like the Monimoto M9, which runs on its own rechargeable battery and moves between bikes, plus a compact alarm disc lock such as the Xena XX-6 or ABUS Trigger Alarm 2.0. Neither needs wiring, both fit in a tank bag or jacket pocket, and together they give you a siren to scare off opportunists and an alert on your phone if the bike moves overnight.
On a multi-day trip, your bike spends nights in motel lots, campsites and hotel garages you don’t know. A few habits make a big difference:
- Carry a self-arming alarm disc lock. The Xena XX-6 arms itself and resets within 15 seconds of a disturbance, so there’s no switch to forget. Use a bright reminder cable from the lock to your handlebar so you don’t ride off with it fitted.
- Hide a battery tracker before you leave. The Monimoto M9 calls your phone if the bike moves without its fob nearby, and its battery is rated for up to a year, so a long trip won’t flatten it. Charge it before you go.
- Chain to something solid where you can. The Stockton 736 alarmed chain is heavy for daily carrying, but on a touring bike with luggage it lets you lock to a post or another rider’s bike.
- Park smart. Choose well-lit spots in view of the front desk or a camera, park bikes together, and cover the bike so thieves can’t see what it is.
- Keep the wired alarm too. If your bike already has a Scorpio SRX-900, its pager remote works up to about half a mile away, which is useful from a motel room.
Packing for a long ride? See our list of things you need on a motorcycle tour and the best motorcycle saddlebags for room to carry it all.
Where to hide a GPS tracker
A tracker is only useful if the thief doesn’t find it in the first few minutes. Experienced thieves check the obvious spots first: under the seat, in the tail tidy and behind the headlight. Better options are inside the frame rails or subframe, under the tank, inside a fairing panel, or zip-tied deep inside the wiring loom where it looks like part of the bike.
A few rules help. GPS and mobile signals don’t pass well through thick metal, so avoid sealing the tracker inside a steel box or directly against a big chunk of frame; plastic panels are fine. Keep it away from the exhaust and engine heat. If it’s battery powered, pick a spot you can reach to charge it. And don’t tell everyone where it is. If you ride with gadgets like a tire pressure monitor or a dash camera, a tracker tucked among their wiring is even harder to spot.
Test it after fitting: walk away with the fob, have a friend move the bike a few feet, and make sure the alert reaches your phone and the location updates.
Alarm or GPS tracker?
If you can only buy one, think about where the bike lives. An alarm or alarm disc lock is the better first purchase for most riders, because it stops the casual thief and costs nothing to run. If your bike is valuable, parked on the street or in a high-theft area, a GPS tracker gives you the best chance of getting it back. Many riders end up with both: a disc lock for stops and a tracker hidden on the frame. If you want navigation as well, see our best motorcycle GPS guide, though a navigator isn’t a substitute for a theft tracker. And if you’re shopping for a rider, an alarm disc lock is one of the best gifts for motorcycle riders you can buy.
Add a physical lock too. An alarm warns you; a lock slows the thief down. Our guide to the best motorcycle disc locks covers alarmed and plain disc locks with pin sizes and security ratings, and the best motorcycle helmet locks keep your lid on the bike while you are away.
FAQ
What is the best motorcycle alarm?
The Scorpio SRX-900 is the best motorcycle alarm for most riders, with a 120 dB siren, impact and tilt sensing, and a pager remote. For security you can carry on a trip, pair a Monimoto M9 GPS tracker with an alarm disc lock like the Xena XX-6.
Do motorcycle alarms drain the battery?
Wired alarms and trackers draw a small, constant current. Modern low-drain units like the Scorpio SRX-900 are designed to minimize this, but if your bike sits for more than a couple of weeks, use a battery tender. Disc lock alarms and battery trackers run on their own batteries and don’t touch the bike’s.
Can I install a motorcycle alarm myself?
Yes, if you’re comfortable with basic wiring. The SRX-900 needs three wires and the Rlink needs two. Disc locks and battery trackers need no installation at all. If in doubt, ask a shop, especially on bikes with complex electronics.
What is the loudest motorcycle alarm?
Among the picks here, the Scorpio SRX-900, Xena XX-6 and Kryptonite Kryptolok 6A all list 120 dB sirens, the loudest of the group.
Are GPS trackers worth the subscription?
For valuable bikes or street parking, yes. A tracker is what gets stolen bikes back, and the plan usually costs far less than your insurance excess.
What’s the most effective way to stop motorcycle theft?
Layering. Combine a loud deterrent, an alert that reaches you, a hidden tracker and a physical lock to something solid. Each layer makes your bike slower and riskier to steal.
Will an alarm lower my insurance?
Sometimes. Some insurers discount approved alarms, trackers or locks. Ask your insurer which products qualify before you buy.
Related reading: what to do if you lose your motorcycle keys.
Verdict
For most riders, the Scorpio SRX-900 is the best motorcycle alarm system in 2026: loud, smart about arming itself, and its pager remote tells you when something’s wrong. Add a Monimoto M9 or Scorpio Rlink tracker for recovery, and carry an alarm disc lock, the Xena XX-6 for convenience or the ABUS Granit 8008 3D for maximum strength, for stops on the road. Layer them and your bike becomes the hard target thieves walk past.
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