So far I only had to change the rear light bulb.
I took the bike to every scheduled inspection and did all the required oil changes. But I have trouble starting the bike in cold weather (below 32 Fahrenheit).
This is a bike I will keep as long as possible. It is very well built and is a pleasure to look at.
I changed the high handle bar and exchanged it with the lower bar, added crush bars, fog lights and Hepco and Becker luggage cases.
The bike is very reliable as long the temperatures are above 32 Fahrenheit.
Having owned a 1998 Triumph Thunderbird 900, I agree that they are excellent motorcycles, if only Triumph still manufactured them. I rode mine for 2 seasons, then sold it for almost as much as I paid for it, and eventually it will be a classic model.
The new Triumph 2007 line up offers nothing like the Thunderbird except racing bikes, so I have moved on to other brands.