Many of you wonder about all the modifications done to the Yamaha TX750 motorcycle. Here is a part of the story which is certainly new to you!
Another point is that I believe that the US Yamaha dealers did not always perform all the modifications which Yamaha required. I have seen several imported TX750 machines herein Europe that were completely standard and had no modifications whatsoever. In Europe 99% of the TX750’s were modified or got a completely new engine. I was, as a young man, in charge then for this project....!
But here are a few examples from the Japanese Parts Book (July 1972) and you can compare that to your own parts book:
Part (2) 341-11164-00, changed into 341-11154-02, plate, cylinder head cover 1, a solid casting was replaced by a pressed steel item. The breather tube 341-11166-01 changed into 341-11166-11 and has a different routing.
The balancer chain has an odd spring loaded tensioner (item 20#) with a rubber wheel originally, part 341-11490-00 was replaced quickly for 341-11474-05 (guide, upper) and later for 341-11474-06.
Originally the starter motor chain was a DK219FT 62L type with a slipper tensioner (item 14#). The slipper tensioner 341-15590-00 was deleted, the chain changed into partnr. 94563-16052 (DID 316FT 52L). A much stronger (and shorter) chain.
Quite unbelievable, the first TX750’s had a normal, small cartridge, gauze type, oil filter instead of the complicated contraption fitted later. The original oil filter with part number 341-13441-01 quickly changed into the number 341-13440-90, which we all do know too well.