Originally Posted by rockydog
a less common signal these days is when you meet a motorcyclist approaching in the other lane and he points at his helmet or head, it doesn't mean he thinks you're crazy.... ..usually. Older police cars had a single red rotating light on top, resembling a bubble gum machine so he is telling you that in your very near future there will be a friendly law enforcement officer, probably with a radar gun. Since a helmet resembles a bubble, etc. Don't see it used much any more.
Have fun out there, stephen
That's still common here in Southern California, especially on the mountain and canyon roads...but it's more of a tapping of the head. Well, to summarize:
Tapping top of helmet: Police near
Thumbs up: Road clear of police (mostly a sport bike thing)
Peace sign / V sign held out and low: simply "Hello". (some alledge it came from V-twin)
and last, but not least
Ass and both feet pointed straight up: "Aaaaaaaaah - - I'm crashing, save my GoPro!!!"