Xena was one of my first alarm locks. Randomly going off all hours of the night. Had a flawed design from the start. Had no idea just how terrible it was until I bought a different brand lock/alarm. I'll never buy another Xena product ever again. The Artago with daily use is still going strong, some seven years later; having outlasted three other alarm locks. (I use more than one at a time.)
Security is about layers and it's not just what goes on/in the motorcycle. The environment is just as, if not more important.
October 14th, 2018...
TITLE:
Xena XX15 Alarm Disc Lock (JUNK)
Greetings all.
This product has a number of positives, volume, possibly battery life, but I am not a happy customer overall. Failures include toughness and sensitivity. I had purchased one of these a few years ago before finding and joining the forum and quickly had issues. There are a few design flaws that need to be fixed.
In a nutshell, it fails vibration chamber testing.
(very relevant if placing product in trunk of motorcycle)
The following are the issues I experienced, beginning with the first week of use.
I tried to return it but the Amazon reseller (playing games) claimed "parts were missing."
So I'm stuck with an expensive, crippled product.
1) The tumblers get scrambled making key insertion difficult. Have to repeatedly spend ten to thirty seconds (sometimes longer) working the key back and forth to get it fully inserted.
2) The glue (yes, I said glue,) securing the latch assembly failed. I pulled it out of the trunk and the metal "door" fell off. Was able to locate the latch cover and latch pin in the trunk, but never located the latch pin spring.
(missing part #1) Without this door in place, the alarm unit will not see the reflective latch cover, causing it stay armed. Move it, bump it, touch it, get treated to an ear-piercing song serenade.
3) The captive screw holding the alarm unit in place backed out. The first evidence of this was having the thing constantly going off in the trunk; and I wasn't in a position to safely pull over and deal with it until 10 minutes later. Never located that screw or a suitable beveled-head replacement.
(missing part #2) Fortunately I wear ear plugs and was able to use a key to disassemble the unit and remove the battery.
PARTIAL MITIGATION:
Riding with it on
you, such as in a bag, mitigates these issues. But this is inconvenient, and unsafe if you're not carrying a bag.
Re #1, found that pushing the tumbler back into the secure position post removal seems to help a bit.
Re #2, was able to find, cut, and use a spring from (an expensive) writing pen, as a replacement for the unit's latch pin. Then tried re-gluing it,
(with Cyanoacrylate and later JB Weld Epoxy,) but like the original, (an epoxy,) didn't last long. In addition, they expand while curing, causing fitment issues. Gluing metals together is simply not a good idea. You need to tack the "latch pin cover" it in place using spot-welds. Even then you still need to do some serious vibration chamber testing to verify that this idea works well enough.
Re #3, was able to bend some bare wire into somewhat of a "MW" shape to help retain the alarm unit. But it's kludgy and unreliable; falls out of place resulting with annoyance alarms. Include with your product, a tiny packet of thread-locker compound and a warning label containing a torque specification; perhaps a backup screw even. It's already finely threaded so that was properly engineered. Perhaps a deeper tap and longer screw length might prevent a full back-out as it will be stopped by the product's service door.
Minus these
critical design flaws, I would highly recommend the product. The product is way too expensive to have these issues.
Artago Disc Locks are far, far, far, far superior... perhaps with exception to loudness.