Howdy! I'm Chris, a 31-year old, planning my dream expedition: Riding off-asphalt from London to Vladivostok, mountaineering along the way. And, I'm trying to decide which bike to ride it on. A bit of background about me, for context: https://advrider.com/f/threads/bike-addict-turned-mountaineer-turned-bike-addict.1419214/ // Routing // We'll follow the TET from London until Turkey; then avoid asphalt like the plague through Central Asia (shouldn't be too difficult to do)--venturing over 4500m/15,000' passes in the Pamirs. Riding the Open World of Mongolia; eventually going far east to the Pacific through Siberia. // Onto the bikes // Initially I was pretty set on a 2011 Husqvarna TE630. I found one in good condition, for a good price, a day's drive from home in Boulder. It would be almost a hundred pounds lighter than the Himalayan I rode on my last trip, with twice the power; and a proven (albeit niche) engine and platform. Then, I began to discover RTWPaul & The Rolling Hobo's affinity for 500's; it got me thinking lighter. At this point, I'm very interested in the idea of a 450/500 EXC, but would love to get some insight from the community on a few variations of these: 2010 KTM 450 EXC Found one of these locally, with low mileage/very clean/some desired upgrades, for the same price as the TE630. The price is right, but wondering how well the carburateur would do with multiple passes over 4500m/15,000' and then going back down low. I have some basic maintenance skills, but rejetting carbs is beyond my area of expertise. 2017 KTM 450 EXC SIXDAYS Found one of these a day's drive away, pretty low hours, Rekluse EXP 3, some other interesting mods. A bit more expensive than the 2010, but seems very reasonable considering what it is. 2015 KTM 500 EXC Found a few of these in SoCal, solid day's drive. They are by far the most expensive option, but generally low hours/mileage/clean condition; and I've seen what they can do from many threads on here. If cost wasn't a consideration, I'd probably jump on one of these straightaway. I've read all about the 450 vs 500 debate; 500 resonates the most with how I ride. But the SIXDAYS has some nice upgrades and is cheaper than the 500s, which would make me consider it--but not sure about the lighter duty design of the 2017 being as well-suited for a RTW 4-season load. That being said, the price is right on the 2010 450, but I'm a bit hesitant going for carbureted instead of EFI (though I know that's the opposite of a lot of the thinking around here.) Finally, I know that the TE630 would be great all-around... But an extra 80 or so pounds adds up when picking a bike up over and over through technical stuff (and I'm a pretty small guy.) I know that no one can choose for me, but I'd love to get some insight from people with experience older vs. newer KTM, older 450 (at elevation) vs newest 450/newer 500. Or if anyone thinks that the TE630 deserves some consideration still. Cheers!