Daytona 500. Bought new in 1970 in Houston when I was teaching near New Orleans.
Just before the warranty ran out it holed a piston. Dealer in NO didn't want to honor the warranty because I didn't buy it from him! I was able to call Triumph, and he did fix it, just took a month to do do. It holed another piston on the way home that day, and he refused to cover it because factory warranty had run out while he had it in his shop.
I left it at a guys house on the River Road, hooked it back to NO, bought a manual and some tools at another dealer and returned to fix it myself!
Like most Brit bikes, that one gave me fits, but taught me a lot about mechanics. I went on to quit teaching and go into motorcycle repair and sales for nearly twenty years afterwards.