I was shop manager at a yamaha shop when the TX 500 was introduced oh god oh god what a piece of #$%*, then one day we have a complete Yamaha engineering team in the shop, interesting, 10 days later they were gone, back to Japan. What a revelation I'd been working on British bikes and the brits attitude was "#$%*ing whining colonials they expect it to work" Damme if it was good enough before the great war it's good enough now. The Japanese were concerned enough to get it fixed ( not quickly enough for our riding season of course) the brits was if grandfather Albert could manage then why were we sniveling.Any how the TX 500 and 750 were a major disaster I don't know if they were ever fixed because not long after that I told every body to #$%* off in 4:4 time at the shop.
Bill the demon.