If you don't want to replace the complete loom, the alarm can be removed quite easily.
Find the main alarm unit, and then cut each alarm wire one by one close to the unit. All the wires will probably be black.
If it starts squawking, keep going and then once free, put the alarm unit on the ground and smash it to death with a lump hammer
Now trace every black wire that you have cut from the alarm back to the bike loom, carefully stripping back loom insulation where needed.
Most of these wires will be just connected (spliced) to existing wires in the loom for alarm power, ground, indicators etc. Some will go to an alarm tilt switch and an alarm LED.
All these can be snipped away from the existing bike wiring, then use insulation tape to protect the exposed parts of the bike wiring.
There will be a pair of alarm wires which imobilise the bike ignition. These are normally near the ECU. Again snip them off, but this time you need to re-join the existing bike wire which was cut when the alarm was originally installed. I always resolder the original bike wires together and use heatshrink sleeving on top, then insulating tape to give final protection.
There may be another pair of wires from the alarm imobilising the power to the ignition or starter, usually near the main 30A fuse and starter relay.
Cut these alarm wires off as well, and re-join the existing bike wires as you did for the previous pair.
Tidy everything up with insulation tape and cable ties......job done.
Here's the monstrosity I removed from my VTR!
