This is NOT how the Duke auto-de-compression system works. I am not an expert or even knowledgable about the internal workings of many engines, but this I do know because my old cam (I got the Stage 1 cam fitted) is right next to my keyboard - I use it as a paper weight and to make my desk look like it belongs to "someone who knows"
The auto-de-compression unit is on the Duke's cam shaft. The cam shaft has has a weight on it which is lightly spring loaded, it operates very much like a centrifugal clutch, as the cam spins up the weight flies to its outer limit and turns a small key which inserts into the closest cam lobe. When the weight is stationary the key "bumps" the valve and decompression results. When the cam is spinning, the weight slides to its outer limit, turning the key sideways where it presents a flat surface to the valve and slips under the valve preventing decompression.
The mechanism you describe sounds like a car's starter-motor solenoid activated pin that drives the clutch.
I knew the 2016 Duke 690 had a new and unique cylinder head, and so far, the only pictures/videos/information I have been able to find are of other 690s. Your description is accurate, based on what little information I have seen. Thanks.
Not sure what the UK post was describing, but it did flush some more information out of the woodwork. Mission accomplished.
I really, really hate to let other people work on my bikes, but, since the bike is still on warranty, I am tempted to let the dealer look at it. Right now they need to give me some correct information to regain my confidence.
I would imagine that simply by removing the cam cover it should be obvious if the decompressor's centrifugal weight is in the position it should be when the cam is not spinning. Sounds like a little Loctite got between the pivot bolt and the centrifugal weight and/or the weight and the camsprocket.
I don't really want to remove the camshaft of a bike under warranty, but I would think removing the pivot bolt and cleaning with carb cleaner and Scotchbrite, and adding a bit of assembly lube, should to get things freed up. Based on the camshaft you have, do you think the pivot bolt could be removed with the camshaft in place?
Any pictures would be appreciated..... of the camshaft that is. No nutscape pictures please. I've dealt with Aussies before (who oddly enough refer to their language as Strine)! Directly related to me Merikan redneck kin they are!