Two of the worst bikes Yamaha ever made were the TX 500 and 750-the latter winning the title of worst hands down. If you didn't strap the 750 down when it was running on your lift it'd try to walk off on its own. Plus......................the bottom end had a tendency to seize
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both models were way overengineered and most likely introduced before all the bugs were worked out. I did own a 500 for a year or so and the description mediocre fits to a tee....Larry