When I was a child back in the early 70's and used to visit my paternal grandparents with my parents, my Granddad used to continually say "aye" all the time at random intervals. I thought he was saying "I". Anyway, I once asked my Mam why he says "I" all the time. My Mam said because he can't think what else to say.
They had a motorbike and sidecar. Never see motorbikes and sidecars now.