My take is how "novice" the rider is. If they have ridden at all before, you can't beat the KDX200 - one of the best bikes ever made, even though I'm not a Kawi fan. If you are talking about an absolute beginner though, you have to consider seat height - not being able to plant both feet in any situation can scare the shit out of a total newbie. One of the best all-time adult beginner bikes was the early '80's Yamaha MX175. Light, workable suspension, and enough power to pull a 250 pounder around until they were confident enough to move up. Plus it was reliable as a rock, and easy enough for a complete moron to rebuild in an afternoon. I am rebuilding a fair equivalent, a Suzuki TS185 for my wife and 16 year old daughter to learn on only because it is street-legal. I do have to admit that the early '80's Honda XR's would be almost as good, but then I'd have to shoot myself.......