There are quite a few plastic model kits featuring the Triumph motorcycle, whether for historical significance, such as the red-caps machine, or TV promotion. Different scales and models... starting with this brit duo: BSA and Tri, from the Grease 2 movie (apparently!)
A nicely detailed semi-built kit, just bolt 'er together and there you are, one Bonneville. Nice detailing too.
Here's the MP bikes, utilitarian singles fromwartime service; (more on this later...)
Heeey! Fonz has his bobbed triumph alse modelized. See previous entries for the bike itself.