I had a 1984 V45 Magna, the sister motorcycle to the Sabre line. It was fun to ride- for a short distance. The seat was a torture device, my rear end hurts just thinking about it.
I bought it new and probably put around 25 or 30, 000 miles on it. Overall, the worst bike that I ever had as far as reliability goes. It was affected by the defective camshafts that Honda had back then. A recall was issued by Honda, but I never got the notice even though I was the original owner and my address hadn't changed. I had to deal with it at my own expense 20 years later.
After it was a few years old it would not restart if I filled the gas tank right up. If I filled it to 5/8 or less it was fine. You have no idea how much of a problem that is on a motorcycle that hardly holds any gas to begin with!
I was on a ride with some friends and one of them informed that my forks were really flexing a lot, as though there was something wrong. The next day I took it apart to check it only to find that three of the four down tubes were cracked completely through, and the fourth was cracked half way through. I was really close to having the front end completely fall off at 60 MPH. That was it for that bike, but I have had three Honda V4's since.