I have collected many Triumph parts lists and catalogues over the years. Here are some downloadable Spare Parts books. These are PDF copies of the original factory publications. My collection of workshop and maintenance manuals are available at Workshop Service Manuals.
TR2 TR3 TR3A
TR2 TR3 TR3A TR4 TR4A
If you find any of this stuff useful please leave me a donation to help with the site running costs at:
Vitesse Mk2 Spare Parts Catalogue you can download the manual below