This is “the other” project I found, quite by chance. A 1973, or 74 TX750 by Yamaha. 
I was talking to a gent about our Saturday projects after running into him at two different locations looking for fabrication ‘parts’. While talking cycles (what else :D) he mentioned he had an old Yammy twin at his shop that he was looking to get rid of. He and his partner do prototype and performance fabrication for sand rails and quads, so I figured even if the bike was a bust it would be a good contact to make.
As you can see it’s pretty rough. The PO stated, “I was told the kick start gear is broken.’ so I couldn’t get it to turn over. After doing some research on this model, and inquiring on my favorite motorcycle forum, I found that the TX had some engine design flaws in the ’73 model, which caused these motors to tear them self apart. The ’74 model year had subsequent changes made to fix the issue, but the damage had been done to the reputation of the model and it never recovered. As a result they aren’t a popular bike, and have a poor reputation, although I did find several groups of dedicated enthusiasts. I will be picking the bike up in the coming days with the plan to part it out to fund my other projects. I say ‘plan‘ because as I research the bike, I find I am drawn to look of it. This is one of the few bikes I have seen that I would be motivated to do a complete, bone stock restoration on. The problem is it would be for a very limited demographic. I have a feeling the deciding factor will, to a great extent, be whether the engine is seized or not…stayed tuned for updates as they become available.
Green Horse Customs 
I am on my fourth TX. Second restoration, three engine rebuilds for the bikes. Two of my bikes are now across the pond in the Netherlands. It’s the 1974 model, I’d be surprised to hear it is seized. Most of the owners couldn’t adjust the contact points effectively and frustration parked a lot of bikes. The best part of this bike is that everyone is thinking in 1974 terms when no one had metric tools and there was no dealer network to speak of. MY last project just left my garage with a number of engine mods. Increase in power was noticeable from the first rebuild. Contact me directly if you want more details.
Unfortunately I had to part with this project with the transition to our new residence. Between my 4 bikes, truck, tractor, 2 Chrysler TC by Maserati cars, zero turn mower work benches and various tools (drill press compressor, etc…my 24 x 36 polebarn is packed about as tight as I can get and still have walking room.