Before people start saying, what a stupid question I am trying to list pros and cons, for a start
1) they drain batteries,
2) if they have an immobiliser and it goes wrong you're phooked,
3) hardly anybody takes any notice of them when they are going off,
4) they can be very expensive
5) They are not a deterrent, if someone wants your bike they will take it regardless of whether it has an alarm or not.
So what are the Pro's of having an alarm fitted to your bike?
1) they drain batteries,
2) if they have an immobiliser and it goes wrong you're phooked,
3) hardly anybody takes any notice of them when they are going off,
4) they can be very expensive
5) They are not a deterrent, if someone wants your bike they will take it regardless of whether it has an alarm or not.
So what are the Pro's of having an alarm fitted to your bike?