When a motorcycle costs as much as some cars to buy new, most of those who buy them are well off old men. We are buying our dream bike, and so we're willing to pay whatever it takes to get it. For the most part, we want it new. Pristine. Unridden by anyone else. We have the ability to pay cash with no problems. But we are dieing off. Those coming after us, don't have the money. Even if they get a loan, the cost is prohibitive for a toy. (And yes, IMHO, a motorcycle of any brand is a toy unless you use it as your only transportation.) And so there aren't many to buy our toys when we're done without us taking a bath in the process by selling it at a huge loss.
The only way you can minimize the loss you'll take in depreciation, is to look for a bike that is used. Let the first owner pay the depreciation loss and put on the farkles...and then buy it from them when they've only put a few thousand miles on it.