I'll post this in my section so as not to pollute the general site with my ramblings. I upgraded the ATK some and had to report cuz there is little info on these bikes out there. New con rod, shock rebuilt, pipe fixed and sealed, pegs uprighted, new Motoz, bars, handguards, light, amsoil in trans (really did help, no clutch needed). This very clean 406 example needed this love for a while. Runs great, rides nice, works fine. Fun bike. Huge bottom and mid and then just more vibs so shift! Ride it everwhere in 3rd. Fun tight trail / gnarly stuff bike. Low seat height, big flywheel, turns nice (Motoz rule) Interestingly I don't think I would like it much for open stuff. I like 4 strokes in the open stuff anyway. blah blah blah...
I never rode one of these but there were several guys that had them in our association. This looks like something I would love. That low end torque and monster mid range sounds like the CR500 I had that I spent several years detuning to ride in the woods.
I have owned a few 480/500 CR's and currently own a KX500. This bike does not have as much power but similar powerband. Perfect for gnarly trails. It is also much smaller and more flickable feeling than the CR or KX 500's
I stare at one everyday at work there's one in the garage across the street, it's temping to go throw the guy an offer but I never do.
My dad had an ATK 604 and that thing was an animal. I was about 13 and could barely reach the foot pegs the first time I road it around some fields. After that little bit I never wanted to ride it again it was scary! It's to bad ATK never was able to make a real go of it.