OK, thanks for the help. I've stripped back the loom and stripped out the wires, rejoining the loom where necessary. Problem I now have is the alarm unit is fixed to the under tray, with what i can only assume is an anti tamper bolt (the nut is circular, not hex shaped!) Having cut all the wires I can't disable the alarm for more than 30 seconds or put it in service mode (needs ignition connection). Everytime I move the bike the alarm goes off.

Short of cutting a hole in the undertray to remove the alarm, is there any way of disabling the alarm unit now it's isolated from the bike loom. At the moment it's not going off. Alternatively, do you know how long the unit's batteries will last with no connection to the bike battery?

Tips and help would be very much appreciated!

thanks