Maybe its possible...
If you have a pal 'up north' it might be worth looking into to first of all export the bike from Japan to Canada, then from Canada to the US. It might not be that simple, but a lot of early grey import cars and bikes always used to come to the UK mainland via Ireland... I think something in the import laws must have changed as they seem to come direct to the UK nowadays.
These bikes are easy to find in the UK, and go for anywhere between next to nothing for the earlier stuff (any first pic under a heading above) and up to about $5000 for the best examples of the later stuff, the RVF400 NC35 being an example. I myself had an FZR250R for a while:
DOHC-4 249cc 45hp/ 14500rpm, 141 kg
RC, why can't you just bring these things back from a holiday, for example, pay the import taxes and get a state inspection? In TX there's no emissions checks for bikes so that's not a problem...