Thanks for all your replies!
A Super Ténere is too big for this trip. At the moment I own a BMW GS 1200 Adventure, the bigest bike I guess
But it is too heavy to use for tougher offroads and there's far too much electronics in there as well. Too bad that they don't have Transalps in Alaska! I will check out the KLR and the NX 700X.
I allready contacted Phil a few months ago and he offered his used bikes. But I don't want to have too much troubles on the roads....my old second hand bike (Yamaha Tenére) had a long trackrecord of failures, so I prefer a fairly new bike.
But I will email the Motorcycle Shop, maybe they can help me. And @ Lonesome George: do you need a residential adress in Alaska to register a bike?
Now I only have to figure out how to PM the TwoMotoKiwis