Just got my 01 250e titled (registered) last week, you need to get from a dealer, an application for title, a VIN varification form and an odometer statement, bring them to the DMV along with a bill of sale, proof of insurance and if you have the Certificate of Origin that seemed to help also. The women at the DMV was a little suspicious because she didn't recognize the bike (didn't mention to her anything about it being a dirt bike), I just told her it was made in Austria and she let me slide. It cost me $192.00.
They don't inspect your bike, You just have to sign a statement saying that you have a horn, brake light, head & tail light. I only got it for traveling on county roads from time to time. but just to be the safe side I went ahead and installed a mirror, brake light, and a hand held air horn on the bars. Keep in mind that this was Jeffco though, (there pretty strict about things) so in other places you may not need so much paperwork.
P.S. This weekend I'm gonna to take it down I-25, just kidding. You have to admit it would be quite a scene, especially from fellow riders!