Is the 406 one of the early ones that I believe was based or built on a Honda frame? Actually I guess those 406's are all early but I know they Rip!! I haven't rode my 605 in a while. I bought it new in like 2000 from a dealer that closed. I think it has like 1300 miles on it and I am on like the 4th rear tire-that Rotax has a LOT of torque. I have considered selling it but the resale on the ATK's kind of sucks compared to other bikes-not sure why since they ARE insanely well made. I think I paid $6500 for it back than and that was cheap in perspective. I pretty much gave up on riding on the street at all with it due to it seems like NO one sees me coming. I kind of want to sell it and go back to like a CR500 and stay the hell off road-streets are just too dangerous but it's really nice being able to ride to your riding spot-
I REALLY like those Liquid cooled 250's as well. They will get your heart pumping for sure.