Everything you suggested would never cause this level of vibration. I had to buy special gel filled gloves, and gel filled boot insoles to keep my extremities from going numb after only a few kilometres. At high speeds it feels like nuts n bolts are going to start undoing themselves, and parts will start falling off. This bike not only vibrates at a ridiculous level, but it is literally incapable of safely preforming to the engineering standards it was advertised. My insurance is over for this season, and I’ve put ye ole disappointing one to bed for the winter. I suppose I’ll have to start getting “ unreasonably dissatisfied “ with my dealership come spring. The rear brake has also gone from being very impressive, to very spongy in a very short period of time. I’ve not adjusted the suspension. And you’re right. It sucks at this setting. Other than the almost unrideable vibration, I love everything else about the bike. Extremely disappointed. I’ve been riding a 2005 Vulcan 2000 that has a bad vibration for 16 years. All I wanted was a nice, unique, SMOOTH, ride. Seems as though if there’s a lemon on the store shelf, I’ll pick it. Thanks for the advice though. Appreciate anyone who could offer some suggestions. Personally I’m certain this is and internal issue. Probably the crank vibration dampening. Or lack there of.