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I have a 2017 dvt and I had the error message come up once when I can to unlock it, tried a second time and it worked ok, is this an early warning...
I had the same in my -2015 DVT. The hands free system needed replacement. It clearly is a problem in 2015 production as I was not the first one....
Have you measured the sag figures for the front? Rider+bike and just the bike. And how many lines are showing in the preload screw if you don't...