The only thing keeping me from getting a single cylinder big bore KTM/HUSQVARNA/GASGAS is the distance between oil changes. Most of my rides are 1200-1500 miles. I don't want to have to change the oil one night after I get done riding my ass off and can hardly go eat diner and shower before I go to bed. I know KOVE was mentioned above, I thought about that one too. There are more and more guys getting the 500 and 501 because they are still big enough to do some hwy but way lighter than any twin cylinder Adv Bike. This is where the Japanese big bore bikes come into play. As
@jeeper has reminded us so many times, a Yamaha only needs two oil changes in its entire lifespan, once after you change the break-in oil at 5 years of service and the second time is when you sell it so you can tell the new owner that it has a fresh oil and filter.
My neighbor had a KLR while owning a GS1200. He took the KLR from Kaysville to Hanksville and back. He had a headwind on the way back and couldn't get out of 4th gear on it to do safe highway speeds. He had to tighten the bolts on his exhaust pipe twice and a blinker and his skid plate. He came home and sold it immediately. He put some semi-offroad tires on his GS.
Last night Harrison and I rode Lewis Peak, I was thinking I should have ridden my 890 until we dropped down the side into N Ogden Divide. There are a few spots that would have kicked my ass. We saw a Ninja 250 off trail on that side once. Some kid thought it was a good idea. There are trails that a bigger 890 would be fun on and then there are some you would die trying to get through. I truly think you need a 450/500 for one bike and a bigger twin cyl bike for another. That gets you to needing $25K to do it. Who's wife will let them spend that kind of money on something so selfish.
Right now, I am working on my wife as to why I need two 300s, an 890 and a new 500. She reminded me last night that I had two 300s, an 890, a Pro R and an Expedition. I also have grandkids that need bikes too. I have a 50 and a 110 as well. I am either going to have to get rid of the wife or get a bigger garage. If I get rid of the wife, I loose half of my toys and then can't afford the bigger garage. Adv Bike riding and off-road riding are two different animals. A street legal dirtbike will only get you so many riding experiences just like an Adv Bike will only take you certain places. Yes you can ride a 690 more places than a 890 but a 300/450 will take you places a 690 can't.
This brings me to why I try to teach my kids that you can marry more money then you can make in a life time. I just got back from S California where my oldest son's best friend did just that. He friend just married a beautiful girl who's parents own a ton of real-estate in Laguna Beach, Dana Point, San Juan Capistrano and Long Beach and other areas. The new father in law called him in to meet with him and Carter thought it was to sign a pre-nup. He was asked if he was an honest man, Carter replied yes and then his soon to be new FIL laid out the real-estate portfolio in front of him and told Carter that he needed to quit his current job to run the family business and that a pre-nup was not needed. The new FIL is dying of cancer and at the wedding looked nearly dead. Carter told him that he loved his current job, company and co-workers and told him that he would have to think about it. The FIL said that he really respected that and he would have to minimally help his wife and daughter oversee it. Carter brokers land deals for a couple of big developers in S California now so he has the experience so it is a nice fit anyway. BUT, again, you can marry more money in a minute then you can make in a lifetime. I married wrong and I want my kids use me as an example. I tried telling my daughter that but she never listened. She married the son of a seminary teacher. I am just thankful that he will work pretty much harder than anyone. He has done well for himself. He put in his time, got an education, worked hard and is now getting the benefits of his hard work.
The conclusion...Marry money and if not, don't get married so you can have lots of toys or be happy with one motorcycle that does everything half assed if you do get married. When I want to go riding and my wife thinks I shouldn't, I just tell her that something is going to get ridden tonight and she can decide what or who. She tells me not to let the door hit me in the ass on my way out.