OK, Confession Time,
I talked to 002 about how I could get rid of the remaining Silkolene 10/40 in the DR when I had drained it. He though it would be a matter of luck as to whether changing the oil cured the situation or not. He was fairly certain that it was not the oil that was the problem and that I should check all adjustments and if neccessary replace the friction plates in the clutch. I found that with the bars to the right the clutch freeplay was fine but I then straightened the bars and saw the actuator arm move, more investigation showed that the coiled up and tie wrapped GPS power supply wire (fitted to go to Church Stretton) had dropped down on the steering head and was now inside the turn of the clutch cable up to the handlebar, straight ahead and to the left the cable was being stretched around the wire bundle so removing all free play in the clutch, in fact, the actuator arm was part way pulled, so reducing the spring pressure in the clutch. 2 minutes relocating the bundle of wire, a quick check that the clutch freeplay had been restored and a ride to check for slipping proved that it was not the oil at all. Moral, don't jump to technical solutions until all simple ones have been exhausted. Cheers again Jethro.
Furry