Guys,
Couple of thoughts regarding the ride to Deadhorse, presuming a non-winter trip:
1) You don't need an "adventure bike". Sorry to disappoint, I know that statement may well raise a few eyebrows but think about this for a moment: Road clearance isn't an issue, you won't be riding in deep mud or gravel anywhere along the way. Yes there's both mud and gravel but no worse than you'd find any number of other places, never more than an inch or two deep and usually a lot less. It would be dead simple to do on a Ninja, a bit more challenging on a Gold Wing. Even KLR's are way overkill but they look cool so maybe they're a necessity for some.
2) Regarding radiator shields: My Aprilia's radiator became clogged with mud and crud to the point a large area several inches in diameter became compacted. Overheating never occurred and when I arrived home I got most of it out by hosing with a sharp stream of water. I've never had any issues to date but if I were going to make that run again I'd try to come up with some sort of shield to prevent this.
3) Towing charges on the Dalton: When I was there in '08 the rate was $6.00 per mile BOTH ways. That would be a disaster for most riders. Generally towing becomes necessary when guys ride off the road or T-bone a moose, not because of breakdowns. Reason is most guys do a thorough prep of their bikes prior to the trip.
4) Flat tires: S**t happens. Carry a spare innertube and repair kit plus a small pump. I've been lucky to the point I don't even worry about jinxing things by mentioning the flats I've had occurred when I ran over something and it was on good ol' USA highways, never in Alaska, etc. Start trips like this with new tires properly inflated and you'll do fine. If you're going all the way to Deadhorse you might call the dealer and ask if they stock whatever tire you use and if not think about shipping a set to them in advance. I hauled spares with me and had them changed out in Fairbanks on the way home although I could have made it without doing so. Someone mentioned using that gooey stuff and I agree, I did and my tire life was much better than my buddy's.
5) I experienced breakdowns twice, one electrical which I fixed myself and the other a clogged air filter, again an easy fix. I won't include what happens when you inadvertantly pump diesel into your tank but it will keep you busy along the roadside undoing it. Although it didn't stop me chain wear was severe as well as both sprockets, rollers, anything connected to that area. I oil my chains and check adjustments religiously but bad things still happened and I had to replace all the components when I got home. One more plus for the shafties...
6) Cosmetic damages: They'll occur regardless of how careful you are, the roads in Alaska and northern Canada ensure that. One poster said he didn't care about such things so for him it's a non-isssue to the ride. My earlier comment was posted as an alert to anyone thinking they could walk away unscathed. I fall into the crowd of people who use bikes as they see fit but I happen to like the way my NT looks and I'll do what I can to keep it that way; if I were going back I'd probably ride one of my other bikes. One poster mentioned renting a Kawi for the ride; I saw a lot of those up there and it's probably not a bad idea for obvious reasons.
The ride to Deadhorse is truly one of the best adventure rides you can do in our part of the world and I strongly recommend it, you'll have a lifetime of memories to cherish. If you're not up to that consider other areas like Hyder or the Denali peninsula, all great rides and the scenary is breathtaking. I'll be more than happy to share information with anyone interested.
LL75