1962 Triumph 6T Thunderbird,
Lot 10
1962 Triumph 646cc Thunderbird Frame no. 6T D15077 Engine no. 6T D15077
Sold for £4,140 (US$ 7,040) inc. premium
Lot Details
1962 Triumph 646cc Thunderbird
Registration no. MGL 651
Frame no. 6T D15077
Engine no. 6T D15077
One of the most important developments in the history of Triumph's long-running parallel twin was the introduction of unitary construction of the engine and gearbox in 1957, commencing with the 350cc 'Twenty-One' (later 3TA). The 500s went unitary the following year but it was not until 1962 that this more modern form of construction was extended to the 650s. A new alloy cylinder head was adopted at the same time and the engine/gearbox unit went into a new single-downtube frame with bolt-on rear sub-frame. Three 650s were offered initially: the Thunderbird tourer, Trophy trail bike and Bonneville sports roadster.

This early 'unit' Thunderbird if offered with green continuation logbook (issued 1971) and old/current Swansea V5/V5C documents.

Saleroom notices

  • This motorcycle's matching frame/engine numbers identify it as a 1961 'pre-unit' Thunderbird and not a 'unit' model as stated in the catalogue.
Activities
Auction information

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