I guess I had better introduce the bike. It's an old hound NX650 Dominator, 1990 vintage, previously owned by three bike journalists, thus proving that I am acutely lazy when it comes to buying bikes. The price, two bottles of wine to Simon Brown of MCN, seemed generous for a runner with an MOT. But actually once I pulled it apart I realised it was a lost cause.
Oh well. Too late for being sensible.
The main trouble is wear and tear, an engine covered in oil, and corrosion. And Simon mentioned that it burned oil. It wouldn't tick over either, which I hope isn't due to a worn carb.
The pics show the bike after about two hours of cleaning.Plenty to do, but it should be salvageable.