Not sure how loose you define tech, but mine would be my motorcyle, a 1981 Yamaha XS400 that my grandfather gifted me. It’s certainly feeling it’s age, so it requires a lot more effort on my end to keep running than most bikes made this century. It’s not made for modern highway speeds, it’s not happy when I try, so I keep it off the interstate, 50 and under. That said, when the weather’s good, I’ve never had a carbeurated engine start so easily, and it’s a joy to ride!