Designed to appeal to the US market, the TSS had an eight valve Weslake Engineering cylinder head developed by American racer Jack Wilson from a design originally commissioned by the Rickman Brothers in the 1970s.
The crank was a fully-machined single forging with increased big end diameter making it much stiffer and better-balanced, and producing one of the smoothest running motorcycles in the Triumph range. The new eight-valve cylinder head had smaller valves set at a steeper angle and recesses in the pistons allowed a 10:1 compression ratio.
UK models had a pair of 34 mm Amal MkII carburettors while the export models had Bing constant velocity carbs. Other changes from the standard T140E included offset conrods, steel-linered alloy barrels, strengthened swinging arm and high output three-phase alternator.
A TSS raced by Jon Minonno for Texan Jack Wilson 's Big D Triumph dealership achieved outstanding results in the Battle Of The Twins races for 1981/2.
According to the Triumph build books, held by the Vintage Motor Cycle Club, the first TSS was built on 27 October 1981 for the north American export market.
Specification and more
The crank was a fully-machined single forging with increased big end diameter making it much stiffer and better-balanced, and producing one of the smoothest running motorcycles in the Triumph range. The new eight-valve cylinder head had smaller valves set at a steeper angle and recesses in the pistons allowed a 10:1 compression ratio.
UK models had a pair of 34 mm Amal MkII carburettors while the export models had Bing constant velocity carbs. Other changes from the standard T140E included offset conrods, steel-linered alloy barrels, strengthened swinging arm and high output three-phase alternator.
A TSS raced by Jon Minonno for Texan Jack Wilson 's Big D Triumph dealership achieved outstanding results in the Battle Of The Twins races for 1981/2.
According to the Triumph build books, held by the Vintage Motor Cycle Club, the first TSS was built on 27 October 1981 for the north American export market.

Specification and more