I bought a new one in 1973. I mention this only because the bike had a twelve-month warranty.
It got traded 11 months later because I couldn't keep it running on all three cylinders. The dealer from which I bought it, wasn't helpful. Within the past year I read that the problem was almost certainly in the spark plug caps. The caps pass through the "ram air" shroud, and when cracked, allow the electricity destined for the plug to short to the shroud. Suzuki eventually redesigned the plug caps.
I suspect that the caps were splashed with water coming off of the front tire, causing them to crack. Other than avoiding rain, I don't think that I could have kept them dry. But I probably could have found some soft caps that wouldn't crack.
Other than that, it was a good bike. In those 11 months, I put 20,000 miles on it.
Bob