So, I buy the 2018 CVO 117 and have all options I could think of including stage IV. I have the bike 3 days, about 400 miles, and the tappet gets loud. The dealership fixes it and I'm on my way. Still a happy customer. 9,400 miles later, because I ride it, same thing only now I hear things flying around the motor. Then the compression relief valve opens and it sounds like the head blows. I pull off of the 1st exit, having no power, and she dies. The tappet disintegrated! Dealership cracks her open and the tappet won't come out. After further break down, the needle bearings are inside my oil pump meaning they passed through the entire motor. Corporate approves a short block but is hesitant to approve a stage IV kit. I'm looking at the marks on my sleeves, gouges on my pistons, An oil pump with grooves cut into the aluminum from circulating bearings and debris, a tappet that no longer resembles one as the roller has gone through my baby. Then I find out that the computer mapping for the 117 stage four was not available so corporate told the dealer to map it for a 110ci. WTF! I just handed them $52,000 and you deceive me on top of my mechanical problems? Now the dealership is building my M8 rather than the factory.