Alarm specifically for motorcycles - Should I?

[OomD]

is the sensor a tilt or vibration sensor? if vibration, can its sensitivity be adjusted?

It's both. It uses an accelerometer to measure G-force, from there it recognises bumps and vibrations, and also calculates angle to determine tilt. A tilt of 5 degrees or more (or bumps, etc) sets the alarm off. Sensitivity not (currently) adjustable, but if the purpose thereof is to minimise false alarms then no adjustment is needed.

what would be the approximate dimensions of the control unit?

Cylindrical shape, diameter 55mm and 40mm high. Pics later...

so no integration into the flashers, to indicate arm/disarm - will it sound arm/disarm?

No integration to the bike's electrics, no. But it beeps to indicate arm/disarm, etc.

[dirtyXT]

  Sorry, I can't help but laugh 

in light of your recent interest in joining us from the land of milk and safety. I will leave you with this BO. he who laughs last, laughs hardest.

  Sorry, I can't help but laugh 

If you ever do buy a house in SA, and get a bike here of course, you might just have to consider this. 

I'm sorry for laughing, I really am, I'd better not move there, I'll end up in prison, I cannot stand thieves. 

we have so many, you get used to them eventually. harmless really. just make sure you bolt everything to the floor with a system such as this one, to shout at them and wake you up. think of it as an adventure.

[Bundu]

sounds good 
I have a remote controlled bike alarm that I imported from china
I modified it a bit, to also trigger my house alarm and added a LED that flashes if the alarm has been triggered, serving as a memory/alert of sorts - It also has a 'warning' function, that chirps the siren a few times if the bike is just slightly bumped
My alarm however draws around 2.5mA when armed, not a problem for me, as I ride often

[OomD]

@BuRP @Bundu

Pictures added to first post.

[Bundu]

@BuRP @Bundu

Pictures added to first post.

Oh, so the control and siren are one unit - looks good and super compact

[big oil]

Where's Fud when we need him?