From memory - which is not as good as it used to be - and even then ..... (errrrm what was I going to say ?)
You have to take the rear wheel out - which involves the rear brake caliper removal. Take the rear fender off - it makes that job easier, and you won't then be cracking your head on it.
Then the final drive unit has to be unbolted - 4 bolts. And removed from the drive shaft. With your other pair of hands, because the final drive is heavy, you have to catch the drive shaft. There's a rubber boot at the forward end and you need to recover that.
Then the brake hose clamps and the hose - can be lifted away - and the rear ABS sensor wire. The rear suspension lower mounting bolt needs removing - but support the weight of the swinging arm, as is will drop suddenly. With all of that lot off, you can undo the bolts on each side of the arm.
BUT - you need the correct tool to put the arm back in again. The proper torque for the bearing is crucial and it takes into account the 'handle' that is on the tool.
DavidSilverSpares inthe UK has some brand new swing arms in stock - whether they will fit your bike you will have to check. The one I saw was for a 2000AY. Not the police model which I think you said you had in an earlier post. You would need to phone them. £475. You get a lot of piece of mind for that. 'spose you'd need bearings too. Sometimes the only difference may be a clip for the wire or mounting for the brake parts. I'v never had more than one unit in my hand at once to be able to compare.
It's a straight forward job, but its not just a case of undoing two bolts. Lots of opportunities for cursing, swearing, trapped fingers. unless you are careful.