I learned to ride in the 80's... in Calif. I took the test on my little kawasaki (fresh bought, and I NEVER rode a bike before), and passed (after teaching myself to ride in a parking lot for 3 or 4 days).
I moved back to the east coast, and dropped my "M" off my license.
15 years later, I buy my Road King... and got a learner's permit. I rode with my Brother in law for a bit, then he ran outta time and I rode illegal. I was signed up for the STATE moto safety course, but wanted to get legal.
I took the test on my RK, and failed about halfway through. They made me push the bike off the course, and then made sure someone was with me to take the RK home (I parked it, then waited a while and STOLE it from the lot...lol).
I started to practice the test..... and went back 3 weeks later and passed it on my RK... 3 days before the STATE cousre started. I almost cancelled the course.
Glad I didn't because I was one of the few in my class that could ride... and the instructor used ME to show people how to do things. He even let me bring MY RK on the course to show people how easy it was to do a figure 8 in the box, on a BIG bike. He also pointed out the date I got my endorsement. It really helped some people get over their nerves, and LEARN how to ride.
The biggest bonus from the course was all the refresher info I needed.... a month or so after the end of class, I was put into a very bad situation..... and everything I learned in class came back and PROBABLY saved both my life and my wife's... I still spent 5 days in a hospital, with 11 or so broken bones, and a collapsed lung! The wife was scraped up, broke a thumb, but otherwise was in pretty good shape. Had I NOT taken the course (MSF), I probably would have either been hit HARD by the car, or been run over by the cars following us. If lucky, the hospital stay would have been weeks... or unlucky, I would have been planted in 3 or 4 days!
I plan on taking the advances MSF, or Harley advanced course... again for refresher. and I know I can STILL pass ANY state's license exam on MY bike... the one I ride everyday I can.