Arizona used to do emissions testing on motorcycles. As a fan of BMW Airheads, and having MBS (Multiple Bike Syndrome), it used to be a major pain in the butt getting the annual emissions check. The emissions people, being more used to Harleys, would put the box fan on the right 45 degree of the bike for cooling. I discovered that with the boxer engine, I could get the technicians to put the fan straight on facing the bike off the front wheel. That blew enough clean air into the sensor tubes, to get me passed.
One of the best days of my life was when the state legislature dropped the emissions test requirement. And they also put in an option for a 5 year registration. Life is good.
BTW, the V11 came into my life after all of this.