Only one stop ever, a few hard looks, and some general chit chat with officers, including bicycle cops. I once tried to beat a cop to the end of a road, with stop signs in between, his dodge charger is faster than my putt putt engine needless to say....
I think the stop was because it was 5 am, dark, and my electrical system had a failure, and I didnt have my proper lights as per the usual. Think they were looking to catch another person who has a dirt bike around here and runs red lights, goes up the wrong way on one way roads, other assorted bs... I guess their first indicator that it wasn't the right guy was that I pulled over when they threw their lights. All went well, seemed like a rookie looking for his big break mostly.
Im thinking I should change the color of my gas tank, looks a little like that guys. It's an old beat up white painted tank from a suzuki ts125, holds 2 and a half gallons.
But otherwise the cops are pretty friendly towards me, some even comment on "how cool" the bike really looks.
Other discussions are held about its legality status, advice is tread lightly and be respectful, "Grey area" just means the line is drawn at interpretation, if you're a jerk, the cop CAN LEGALLY be the bigger jerk, and you'll be crossing the line before you even shut your engine off.
Riding with a smile is free, keep it that way.