What about a ktm sx mini? I think the older ones were called mini adventure. Not only is it a very short bike, but narrow and light too! We were cobra all the way in 50 days, but those mini adventures were great little bikes. My daughter turns 4 next June, and there will definitely be one in my garage. I dont know specs off my head, but I would say it has more usable power than a pw or ttr. And a very plush 5-6 inches of suspension travel. Worth a look anyway.