Hey, thanks - although I think the photo flatters the bike a bit. It's quite tatty really.

The bike is now beautifully quiet. I think taking out the camchain tensioner and resetting has tightened things up, plus cleaning up the head and valves and setting the tappets.

The bike is going well, although I seem to think there is less engine braking than before, even with the throttle cables set with a good bit of slack and the idle set as low as possible. Possibly it's my imagination. But the backfiring is GONE.