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The frame # is stamped on next to the steering head on the left side.I have a 77 but I think a 73 has right side shift,a 78 would be left side.73 has front disc brake ,rear conical hub drum brake.I think 73s were the last year of the 650s? although 750s were also available.
Other wise I think they are similar the 76/77/78 T140Vs
 

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Look VERY closely on the left side of the frame at the headstock. It may be tough to read the numbers, but they should be there.

1973 serials= T-120 JH15435 onward, T-140 (724cc)=JH15435-XH22018, T-140 (744cc)=XH22019 onward.
 

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Discussion Starter #6
Finally...

Thanks for all the help; I finally found the frame number. And thankfully they match. Now I have to decide what to do first and where to start the restoration process. I sure hope that manual gets here fast...
 

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hey Poot ,betcha cant wait to chop that silly sissy bar off....
 
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