I have a very early (1991) 900 Trident which I bought when it was twelve months/1,000 miles old. It has now coming up to 104,000 miles & still runs perfectly. My wife & I have been to France thirteen times, Switzerland twice, Spain twice, Italy, Andora, & Germany. The only time the bike has let us down has been due to the ignition control unit, the coils, & the ignition pick up, all of which are German made PVL. These items have been replaced with British made Gill parts which Triumph fitted to slightly later bikes anyway, & have proved reliable. The engine oil still doesn't require topping up between 5,000 miles changes, & the powdercoat on the frame is still in excellent condition. I upgraded the front brakes many years ago to four pot calipers & floating discs, & changed the starter sprag at 70,000 as it was just starting to slip occasionally. I also rebuilt the carbs, Mikuni BST 36mm as the flat slides run in plastic guides which are a sacrificial part to save wear on the bodies. As they wear the slides start to move at a slight angle, which then wears the needle jets/ emulsion tubes.
So all in all a very good bike, but compared to my older bikes, a little bland.