Welcome to the club, Andrea. I bought my 2014 Sport used, but with very low miles, at a really good price, and I plan to keep it forever. But I've been a Norton guy now for 48 years, and it's too late to back out now
. My bike had some problems with high idle speeds and such, but the later models seem to have fixed most of that. I did have to go through a lot of mods to get it running properly, but now I'm quite happy with it. If you go back over the posts here, you'll find many owners unhappy with the typical problems (poor idle, oil leaks, etc.), and some with serious engine failures. But you'll also find quite a few who haven't had any serious problems, and are quite happy with the bikes as delivered. It can be pretty confusing. It sounds like the owners of the later model bikes with the later Omex ECU have a little less problems than those with the early Omex or SCS ECUs. I tend to agree with iwilson that a lot of the problems with idle and poor low speed running stem from a poor design of the idle air control system, and I did have to remove mine to get it to run properly. But again, that seems to be less of a problem with the newer bikes.
My take, from my experience and following all the posts here, is that the bike is really best suited to a Norton enthusiast, who understands it is not mass produced by a major manufacturer, and will have it's issues. It really helps if you are mechanically inclined and used to working on your own bikes. Of if you have plenty of funds to spare and have a local shop willing and able to work on your bike. If you want a totally reliable, trouble free, modern bike with great handling and performance, at a reasonable cost, with dealer service almost everywhere, buy a new Yamaha, Honda, etc. They are great bikes, but they aren't Nortons.
On the plus side, the modern Nortons are gorgeous bikes, with the best modern suspension and brakes, and they handle beautifully. The engine may sound like a threshing machine, but normally runs quite well and makes plenty of power for very spirited riding.
It would be much simpler for those of us in countries without much dealer service available if the factory would at least offer a convenient on-line parts outlet, but maybe they'll get around to that eventually. They are actually pretty good about selling parts direct if you call and explain that you have no local dealers.
Just my humble opinions
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Ken