BMW's maintenance schedule for the R9T goes by mileage or time, with oil changes being every 6,000 miles or 12 months, and brake fluid every 12 months or 6,000 miles, whichever comes first.
I would check the oil level sight glass to see how clear or dark the oil is. Same with the brake fluid. But if that is the original brake fluid, even if it's clear, it's several years old now and I would replace it. And if you're doing that, you might as well do the oil and filter, too.
You could ride the bike as-is for now and it'll probably be fine. But doing those services now would give you some peace of mind, not having to worry all the time whether you should have done them.
One other thought -- If you have any friends who ride and work on their own bikes, maybe one would be willing to help you do the maintenance yourself. It's a great way to learn, save some money, and build comradery with fellow riders.
I would check the oil level sight glass to see how clear or dark the oil is. Same with the brake fluid. But if that is the original brake fluid, even if it's clear, it's several years old now and I would replace it. And if you're doing that, you might as well do the oil and filter, too.
You could ride the bike as-is for now and it'll probably be fine. But doing those services now would give you some peace of mind, not having to worry all the time whether you should have done them.
One other thought -- If you have any friends who ride and work on their own bikes, maybe one would be willing to help you do the maintenance yourself. It's a great way to learn, save some money, and build comradery with fellow riders.