I've always used a 120/90-18 D606, they don't make an 80 series and the extra height is nice. I'd just use an OE Yamaha filter and bring a spare, changing it every other change, then deal with a filter that really doesn't filter that well. Why 14/49? There's very very little clearance between the chain and the case/case saver with a 14T, as the gouges in my case saver will attest to. Run 13/46 or 47 with the taller D606 for damn near perfect gearing for cruising and trail riding. Dan and Shawn are still renting gas cans if you want to forgo the bladders and the rotopax as the 3.7L tank alone should be fine for the getting up here part of the trip. I only had to use my 1/2gal of spare gas (in MSR bottles) once on my ride up here, and that was because of nasty head winds and the fact that it was winter so most of the stations on the Haines Highway were closed. I'll be working a ton this summer, but feel free to send me a PM when you get up this ways if you need anything.