Back in the 80s a older fellow, lol I'm almost his age now knew I was a gear head and would ask me to help and install motors on his bike, I guess that poor chap had me remove and install 2 or 3 both electric and gas engines he just never really liked them, i liked them but not in my budget in those days,
He would try to pay me for my time but i refused to accept a penny,
One day he got an electric trike and hit me to put it together which I did again refusing pay,
He told me there was a box in his garage with my name on it, he gave me the taz gas engine he had, I thought he mailed it back but no, he just gave it to me, I had a blast with it.