Post-World War II, Triumph’s larger twins remained recognizably similar to the first Speed Twin of 1938. But as the 1960s dawned, unitary construction of engine and gearbox, already a feature of the 350 and 500 twins, was applied to the 650s, launching in the 1963 model year. The café racer’s favourite since its launch, thanks to lusty acceleration and a top speed approaching 120mph, the Bonneville continued in this new form as Triumph’s top-of-the-range sportster. Adjustments to frame design and general specifications over the years, included standardized 12-volt electrics, shuttle-valve fork internals, independently adjustable ignition points, Amal Concentric carburettors and a long overdue twin-leading-shoe front brake. The Bonnie continued essentially unchanged, before the launch of the ‘oil-in-frame’ models in 1970.
The matching-numbers bike offered here is one of the truly classic Bonnevilles. Owned for 30 years by an enthusiastic Southern California couple, the bike was lovingly used for touring around the state before being sympathetically restored. Repainted to original color specs to a very high standard, the engine was overhauled with all the cycle parts. Fresh from a re-commissioning, including resealing the inside of the gas tank, the bike is offered in excellent mechanical and cosmetic condition.