'It doesn't matter what you ride, as long as you ride' so they say and with that in mind I always nod other two-wheeled riders.
The only thing that makes me chuckle is when you see a rider (in my experience, it's the plastic rockets) who look as though they are about to dislocate their necks when they nod. They seem to fling their heads around manically when a simple nod will suffice.....bless 'em
. I always find that cruisers, harleys, Pan riders etc prefer a simple raising of the hand instead of a nod.