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Xena XX15 Disc Lock with Alarm

Item: P243629

Lock: High nickel-content stainless-steel mono-block construction with a broad fit profile and 14mm (9/16") double-locking, carbide-reinforced hardene… Read More

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Product Details

Xena XX15 Disc Lock

An extremely strong lock body and piercing alarm make the high-performance XX15 a remarkably effective way to protect your motorbike. 

Lock: High nickel-content stainless-steel mono-block construction with a broad fit profile and 14mm (9/16") double-locking, carbide-reinforced hardened-steel locking pin. Freeze-spray resistant, pick-resistant key and barrel.

Alarm: Shock & motion sensors trigger a piercing 120dB anti-theft alarm powered by a single CR2 long-life Lithium battery. Self-arming, with no on-off switch, re-sets to armed mode within 15 seconds.


  • 2 3/8” (60mm) throat width
  • 9/16” (14mm) diameter carbide-reinforced hardened-steel locking pin
  • 100% stainless steel 
  • Total corrosion resistance 
  • Double-locking system 
  • Maximum security key & barrel 
  • Freeze spray-resistant key barrel 
  • Ultra-high strength
  • 120dB alarm
  • Auto arm/disarm 
  • Shock & movement sensors
  • Removable alarm module  
  • Weight: 740g


  • 1 XENA Disc-Lock
  • 1 CR2 Battery
  • 3 Keys
  • 1 XENA Lock Tool Etched with Unique Key Code

Please Note: Battery comes pre-installed in lock.

Product Style RevZilla Item # MFR. Product # Availability
Product Style Stainless Steel RevZilla Item #893642 MFR. Product #XX15 AvailabilityIn Stock: Ships within 24 hours


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Reviews & Questions

4.3 / 5.0
15 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Bang For The Buck
3.8 / 5
1.0 / 5
5.0 / 5
Ease Of Install
4.4 / 5
Fit & Finish
5.0 / 5
4.8 / 5
Bang For The Buck
4 / 5
Ease Of Install
3 / 5
Works Well, but Cumbersome
I have purchased several Xena disk alarms over the last eight years. This new version is nice, but more difficult than past models to lock. Past models took a 1/4 turn of the key to lock / unlock, but this new version takes a 1/2 turn. If I cock my hand and get ready, it is doable, but if I forget to rotate my hand 1/2 turn the other direction before starting, then I do not have enough twist left in my wrist and I need to let go, untwist my wrist, then continue with the unlocking turn. During this time, the alarms goes off like a maniac and I go deaf. I liked the 1/4 turn better.
April 28, 2014
2014 Indian Chief Classic
Bang For The Buck
5 / 5
Ease Of Install
5 / 5
Easy to use, hefty, and loud
It installs easily. The "warning" beeps clearly let you know when it is armed or when it is about to go alarm. Definitely wear hearing protection if you are going to experiment with it. It was not clear to me in the description and this is my first disk alarm so I did not know it is intended for the front disk. I assumed it was for the rear. Knowing that, I probably could have used a slightly smaller one. Regardless, I am pleased. I did not rate durability because I have just bought it but it seems like it is built to last.
August 5, 2014
2005 Kawasaki ZG1000 Concours
Bang For The Buck
4 / 5
Ease Of Install
5 / 5
5 / 5
Great Lock, Finicky Alarm
The alarm itself is great. It's made of heavy duty metal. I've had my lock for a while and there are scuff marks from use plus wear and tear. However the metal isn't displaced from me being putting it in a mail box and retrieving it when I returned home. Also, it hasn't rusted (even around the scuffs). I've had the alarm since February 2014.
The alarm is loud. 120 dB is loud, not enough to burst eardrums, but enough to make you want to figure out how to make it stop or get away from it. It works fairly well when the IR line is actually broken. There is a sensor in the alarm itself that reads and arms when the IR line is broken (by the brake rotor) and you lock the lock with a key. The problem with this alarm is that if you have a gap in your rotors (supersport brakes), it might not arm the alarm properly. It'll still lock though.
I can't speak for other bikes, but I know that for the front brake rotor of a 2008-2015 R6, the alarm will NOT arm. So that was just another function that was advertised but I was unable to utilize it. Double check what other people are saying about the models or you're going to have a hard time trying to figure out how to arm it and break the IR beam to arm the alarm. The IR beam and sensor is about 1.5 cm away from the locking shaft.
You CAN (if you're really wanting to make it work) stick a piece of paper in the locking slot, break the beam that way, and force the alarm to arm. However, if the paper falls out in the middle of the night, all your neighbors are going to hate you.
January 8, 2015
Bang For The Buck
1 / 5
Ease Of Install
3 / 5
4 / 5
Alarm inconsistent but the overall lock works
I bought this lock because of the alarm feature and the alarm works when it wants to. The instructions were unclear on how to arm and unarm the alarm of the lock, also the battery was a pain to install the first time. When I'm riding, the lock is in the tail of my bike and about a week ago from today (9-1-14) the alarm has been slowly going bad. It goes off when it's in my rear seat, and the actual alarm itself isn't as loud. The good news is that it's still a lock and it's hard to pick so the primary function is still there. However, if your buying this because of the added alarm feature, skip this product.
September 1, 2014
2012 Yamaha YZF-R1
Bang For The Buck
4 / 5
Ease Of Install
5 / 5
5 / 5
Good lock for the money...
After reading other reviews, I was a little worried when I purchased this, but the lock worked great. You do have to be ready when you take the lock off of the bike, since you only have a little time before setting off the alarm. If you follow the instructions, the lock works great... The sound is probably not as loud as I would like, but it is enough for people to know that someone is messing with the bike. I put the lock back in the packaging when I do not us it and I have not had any issues with it going off in my saddle bag.
October 19, 2015
Bang For The Buck
5 / 5
Does what its supposed to do.
I have been fortunate enough where i haven't had hear it go off. But it does the somewhat job of protecting my bike and keeping me somewhat at ease. Ultimately, you need multiple layers of security, this being one of them. its simple, feels like it's made of high quality material, and it fits. I've tested it myself a few times and yes, a good nudge will set off a warning that will turn into an ear-piercing siren.

It fit easily in my storage compartment and has been good for a few weeks now.
September 16, 2013
2008 Suzuki GSX-R600
Bang For The Buck
4 / 5
Ease Of Install
5 / 5
5 / 5
Favorite new gadget
I live in St. Kitts, in the Caribbean. It's mostly ghetto here and I own one of like 3 CBR's on the island. So everywhere I go, I get shifty eyes and sketchy characters walking up and checking out the bike. With this lock, I sleep so much better at night. Loud as heck alarm, if you're close by; enough to scare off anyone trying to mess with your bike. Sexy finish, quality parts, takes half a second to install and sneaks into my tiny storage space under the back seat (with undertail exhaust that eliminates all the space back there) Highly recommend to all my friends. It seemed a little pricey at first, but then I thought that this would last me for years and years. Totally worth it in my mind.
October 14, 2014
Bang For The Buck
3 / 5
Good lock and alarm
Installing the battery was a painful experience. Per the instructions, you have 20 seconds to install it before the alarm sounds. Mine sounded immediately and every time I would just about have the thing screwed back, it would go off again.

Now that it's set up, it works perfectly and you quickly get used to removing it quickly to avoid the alarm. It is very loud when it goes off and definitely do its job. Won't deter seasoned thieves but it will let you know someone's messing with your bike if your within earshot.
April 20, 2014
Bang For The Buck
5 / 5
A little tough to setup, but really makes you feel safe!
Alarm went off a couple times when setting it up which was quite unpleasant but once you have the battery in and it on your bike you feel really good.

I have this on a 2005 Yamaha Roadstar Warrior.
November 11, 2013
2005 Yamaha XV1700PC Road Star Warrior
Bang For The Buck
4 / 5
Excellent product and quality.
Excellent product, very loud up close enough to scare everyone standing next to it. The metal quality is awesome and is easy to cary everywhere.
July 8, 2013
2013 Harley Davidson Softail Slim FLS
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 16 questions Browse 16 questions and 33 answers
Why did you choose this?
RevZilla Store
Added security.
Darryl S on Apr 30, 2017
Large diameter locking pin, alarm and perceived value vs competition
andreas a on Sep 13, 2016
Added security.
Darryl S on Apr 30, 2017
I've seen good reviews of this item. In the past, I didn't use a lock. Now I commute sometimes to San Francisco, and I have to park on a city street. I want a lock that prevents both theft and general messing around.
Joseph M on Sep 24, 2016
Large diameter locking pin, alarm and perceived value vs competition
andreas a on Sep 13, 2016
Compact security
Joseph B on Sep 2, 2016
Excellent reviews.
Loren B on Jul 31, 2016
thought it was a good idea for my other bike but it never worked like it should wrote the company got no response would not advise anyone to buy this product
Ed M on Feb 29, 2016
I chose this for the Alarm feature.
Iris B on Jan 21, 2016
for security
Meryl F on Oct 27, 2015
Good reviews
S C on Oct 22, 2015
New bike
Jon H on Mar 29, 2015
the video review.
Webly B on Dec 26, 2014
Best bang for the buck and it fits
Daniel T on Jul 14, 2014
looks like good way to have peace of mind
brock b on Jul 2, 2014
Need to protect my investment. Hopefully, this is enough to deter theives.
Talha S on Jul 2, 2014
Recommendation from a long ago RideApart article.
Lukas J on Apr 21, 2014
For son's motorcycle.
Robert C on Mar 8, 2014
don't want to loose the bike
brian h on Feb 16, 2014
safety and convenience
Eddy L on Oct 19, 2013
I've seen good reviews of this item. In the past, I didn't use a lock. Now I commute sometimes to San Francisco, and I have to park on a city street. I want a lock that prevents both theft and general messing around.
Joseph M on Sep 24, 2016
Compact security
Joseph B on Sep 2, 2016
I haven't bought the bike yet, but would this fit a small cruiser like a Yamaha V-Star 250 or Honda Rebel? Both 2014 models.
A S on Jun 16, 2014
BEST ANSWER: I have a honda and it fits on there I think these are pretty universal, most of the wholes fits , worst case save the box and revzilla is great with returns if you take care of it. Btw this alarm is loud!!!!
Which one will fit a 2013 Victory Cross Country?
A shopper on Sep 23, 2013
BEST ANSWER: You'll have to measure the gap between the brake rotor and the thing it is mounted to, if it is more than 14mm you are good to go!
Will it fit a 2018 street bob?
A C on Jul 28, 2018
BEST ANSWER: Yes it should fit with plenty of wiggle room
Does the xx15 model now have bluetooth features?
A C on Jul 1, 2017
BEST ANSWER: To my knowledge no.
I have a 2014 600rr and I was wondering what size xena disc lock for the xx series fits and is best?
Andy S on Sep 16, 2014
BEST ANSWER: I would measure your rotors, and also the thickness. Also the throat distance where it fits over the disc is important. I seem to remember the website gave some info, but I went online to the Xena website for more details. I would also suggest you get a lanyard to hook on your handle bars so you don't try to drive off with it installed. TWICE!!!!

I have a Honda CBR125r and wondering which Xena lock to get. What is the difference between the Xenas (10, 15, etc)?

Charlynne S on Aug 10, 2014
BEST ANSWER: Not sure.. look at the throat depth specs...
Will this fit a 2001 honda cbr 929?
A shopper on Jun 6, 2014
BEST ANSWER: Based on pictures of your bike I see online, the front rotor slots look pretty standard width. I too feel my slots are "standard" and the lock fits with room to spare. I would think this would fit your bike just fine.
What's the difference between xx14 and xx15?
Charles Gabriel C on Apr 21, 2014
BEST ANSWER: It's depends what bike you have and the size of the disc on your wheels
Will this fit a 2011 Tiger 800? I have not had a chance to measure my disc. Not sure if I should go with the XX-14 or the XX-15. Thanks in advance.
A shopper on Jan 6, 2014
BEST ANSWER: I use this lock with a 2014 Indian Chief Classic, so don't know whether it will fit your bike. The most important consideration is the thickness of the disc...not the diameter of the perforated holes. When I use the lock with my bike, it goes through one of the pie-shaped cutouts in the disc.

Hope this is helpful and good riding!
which should buy for yamaha r15?
Leonel B on Dec 1, 2013
BEST ANSWER: Measure your disc thickness. This one fits my front but not the rear. I would prefer to put the lock on the rear but I ordered the lock before my Ebay purchase bike was delivered. I have yet to attempt to us the alarm feature. Even to install the battery you must endure the alarm being actuated. I am also afraid I will fumble the lock removal process and set the damn thing off early in the morning. I live in a small apartment complex and don't want to subject my neighbors to screeching unnecessarily. The every time you need to change the battery you need to go through the initiation of letting the thing go off. Would be nice it if the alarm function were more user friendly, but maybe this is just the most bullet-proof design available for the price. The lock does not come with the coiled plastic reminder cord that many locks do. If I had it to do again I might end up buying the same product again (with a larger gauge slot to accomodate larger rear disc) but I would do much more research on the alarm features of different options.
15 Customer Reviews
15 4.5/5
15 Questions & 15 Answers
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