[nelly]

Antony, just a quick suggestion. Whilst you're at it I'd guess if you check the swingarm float, it'll need shimming up. The ones i've had in have needed it. Bikes of this age generally get looked after "at home" and it's often over looked.
I'm guessing you have a manual? It'll tell you how in there and give you the specs'.
Give us a shout if you need any help or shims.