Yamaha XS750
The Yamaha XS 750 and Yamaha XS 850 was a line of motorcycles produced by the Yamaha Motor Corporation from 1976 to 1981 for the worldwide motorcycle market. The last model year of manufacturing was 1981. Released in Japan in 1976 as the GX750 sporting wire wheels (as opposed to cast alloy in all other models) the XS750 became the name for the export model.
These bikes are usually referred to as "Triples" because they have 3 cylinders. The first 4 model years the bike displaced 750cc. This was increased to 850cc for the final 2 model years. There were various changes made to the model over the years.
Read more about Yamaha XS750: 1976 XS750 “C”, 1977 XS750 “D”, 1977 XS750 “2D”, 1978 XS750 “E” and “SE”, 1979 XS750 “F” and “SF”, 1980 XS850 “G” and “SG” “LG”, 1981 XS850 “H” and “SH” “LH”