Oddjob,
I had one of these -- bought it used in '79, put 10k miles on it with absolutely no issues until it got wiped out by a cager making a left turn...
1976 Yamaha RD400 - and mine was this green color as well...
I got other bikes later - a brand new '82 Yamaha 550 Seca after the RD got totaled, then a used '82 Honda V-65 Sabre fell into my lap a year later...