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"What is a pre unit? I know I knew once but old age and memory loss have set in "
Triumph went to 'unit construction' (engine's bottom end and gearbox all contained within the same set of cases) for the 650's in about 1963, (the 500cc's the year before). Up until then the engine and gearbox were seperate parts, these are known as pre unit :wink:
Cheers, Moff
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Linear Mode
