That's an odd request. I'm in SoCal an I don't remember DMV asking for any info like that. Not even sure what to look for if they did. What are you trying to do at DMV?
Just trying to register the bike. They asked for the vin, and the next question says what is the motorcycle engine number. I looked the whole engine over, still in the bike of course, but I didn't see any numbers.
Ok found it....saw this on another forum and checked my bike to see if it's there...
Stamped on the engine block just in front of the swingarm. If you position yourself on the left hand side of the bike, behind the engine, sight down the chain towards the engne, you should see it.