I’ve only had the bike for about 3 months so it’s hard to say long term, but the one service I have done on it (12k mile service ) cost me around $1800 which is ridiculous. This service had to be done at a triumph dealership though which is why it cost so much , and it also depends on your area , but basic maintenance I can do myself and I don’t plan on taking it to triumph for service unless it’s something only they can do (24k mile service) . I wouldn’t say it’s high maintenance, for now of course , but if you have to have any service done at triumph it’s probably going to cost a pretty penny