Waves on anything other than a harley davidson/custom/chopper or kick @ss crotch rocket are
They are the only ones (harley guys really, but I'll give some latitiude to other riders) I ever remember see giving the wave for the longest time.
Then vette guys started doing it....now f-body guys? Heck, I had a guy in a Cummins Powered Dodge give me the wave when I was rolling down the road in my CTD? Its one thing if you stopped at a light or getting gas or at WaWa, but on the road leave the wave to the bikers......its theirs
a little history
http://bigbearbikers.com/bbrr/wave.html
Chris