I don't know....I think it is a money thing (or lack of) for the newer riders. We all spend good money on our bikes, then go out and spend more money on changing them with aftermarket parts that should have been there in the first place, plus all the gear that goes with it. It is an expensive hobby!!
If I were to become a visionary and invest in the next transportation wave, I would look into the electric motorcycle, a 150 mile range, top speed of 80 MPH, quiet, and most of all.... under $8K for a top of the line bike. I'm not going to buy it, however I think the younger generation would.
Our generation is almost a cult with our Harleys, we won't change, but if the motorbike companies want to stay in business, they had better start marketing to a new clientele, with a newer designs, environmentally safe, inexpensive, fun, and reliable means of transportation. The days of rallies, beer nights, and bad ass imagery, will soon be over! IMHO