I was certain it was AI written by the end of the first paragraph. Hard to analyse why precisely.
It's highly repetitive
Many sentences, although long, actually convey no factual information
If you were to replace the main nouns, in this case John Wittner, Moto Guzzi motorcycles and Pennsylvania with two other names and another place name, the article would still make just as much (or as little) sense.
Frankly, an AI obituary is probably the most soulless thing I've encountered in a long time.
I came to the same conclusion but I couldn't quite articulate why. Your description nailed it.