Best 80s bike I ever owned was my new 81 Triumph Thunderbird, same size bore as the 750 Bonnies but shorter stroke, single Amal carb, single front disc and rear drum brakes, they made 2 models one for the Europe market and one for the USA market, mine was the one for the USA market with the smaller tank and blue and silver paint job, this was a simple bike but it handled well, was very reliable, always started on first kick every time whether cold or hot, it just kept going, it was a very smooth bike to ride a lot smoother than the 750 Bonnies at the time, I ended up putting a 2 rare earth Joe Hunt magneto as I got a rebuilt one cheap off my mate, had short reverse cone mufflers and Koni shocks on it.
My biggest regret was selling it, I clocked up 250K kms on that bike in 9+ years of owning it, did a lot of long distant travels on it and started to date my wife on that bike she also went on a few long travels on the back, it just kept going and I did a full top end rebuild on it before selling it, didn't touch the bottom end, the 81 Thunderbird never made it to the USA at the time and there was 5 on the production line when the factory workers got locked out, I brought it new when I was building/converting my Commando to the Featherbed frame as I needed a bike for work back in the early 80s, cost was $4,100 on the road at the time, it pulled like a train up in the steep ranges and went like the clappers with that short stroke motor, a friend gave me a old bread box tank for longer mileage range when traveling as the small USA peanut tank was small compared to the bread box tank, here are a few pics of it.
Not sure why the first pic rotated that way has never done that before when using this pic, the second pic is arriving at my brothers place after a 600 mile trip from Brisbane to Sydney then a few days later to Bathurst to the Easter bike races all up did a 4k miles+ road trip, in the last pic with the bread box tank and JH magneto + my old red cattle dog Aussie.