I would venture a guess that most of the 1999-2009 spike was all the middle aged guys who bought Harley's because it was the thing to have. I have friends who bought one, kept it several years, and sold it, never to ride a motorcycle again. Similar to how the golf industry in US had a huge spike from late 80's to late 90's - it was the thing to do - join a country club and learn to play golf. I wonder what the non-Harley sales graph would look like from 1990-2016.
Nope, it had to do with the gas shortage.:smile2: