Oh, you've got Steve's bike. Isn't he the one who did loads of nasty offroad stuff in Germany and if I recall correctly ripped the rear of the bike off on a rather nasty rocky downhill. He managed to put the majority of the bits back together but fabricated the driveshaft from a piece of square section metal fencing that was nearby. Amazing repair job really considering the bike had been under water following its roll down the hill.
He also mentioned that he'd forgotten to fill it with oil after doing an oil change, but that the bike seemed fine after a 5 mile ride to his nearest Halfords where he topped it up with a couple of liters of their economy car oil. It wasn't rattling too badly and seemed to quieten down once the oil went in. The cheap Halfords oil doesn't cause too much smoke apparently.
One last thing was that he'd put an extra couple of bypass valves in the ABS system to ensure that when the rear brake light failed, the ABS wouldn't fail but would instead spin the servo at twice the normal speed ensuring even more braking power.