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The Bonneville name came from the achievements of Texas racer Johnny Allen on the Bonneville Salt Flats in Utah. In September 1955, Allen had achieved a two-way average speed of 193.3 mph (311 km/h) on his special motorcycle the "Devil's Arrow", a 650 cc twin-cylinder Triumph engine fuelled by methanol in a unique
The original Triumph Bonneville was a 650 cc parallel-twin motorcycle manufactured by Triumph Engineering and later by Norton Villiers Triumph between 1959 and 1974. It was based on the company's Triumph Tiger T110 and was fitted with the Tiger's optional twin 1 3/16 in Amal monobloc carburettors as standard, along with that model's high-performance inlet camshaft.
The Triumph Bonneville T140 is a standard motorcycle with a 750 cc (46 cu in) capacity engine that was designed and built by Triumph Engineering at Meriden near Coventry.. The T140 was a continuation of the second generation in the Bonneville series developed from the earlier 650 cc (40 cu in) T120 Bonneville and was produced by Triumph in a number of versions, including limited editions, from ...
650 1969-72 R is "Road" Model. Trophy renamed Tiger for the 650cc single carb as distinguished from the twin carb of the Bonneville (TR120) 650cc. 500cc Tiger single carb renamed Trophy. TR7V Tiger 750 thru78 Almost identical to the T140; differentiated by the Tiger having a single (as opposed to twin) carburettor. Other differences being cosmetic.
The TR6C Trophy Special was built at the request of Triumph's sole US distributor at the time, Johnson Motors in southern California, as a way to target the growing number of desert riders. It was fitted with Dunlop Trials Universal block-tread tires and was the model referred to as the "Desert Sled". 1968 650-cc TR6C Triumph Trophy
The now-oversquare modified engine used the 650 Bonneville twin-carb cylinder head having bigger valves, ports and carburettors than a standard Triumph 500, allowing for efficient air-fuel intake at racing speeds. The 650-size crank journals and main bearings were larger than a 500 which allowed for greater reliability.
650 cc Triumph twin-cylinder engine in a Norton "slimline" featherbed frame Whereas the Norton 650SS 646.44 cc had a bore and stroke of 68 x 89 mm giving 49 bhp (37 kW) @ 6,800 rpm, the Triumph T120 Bonneville 649.31 cc had a bore and stroke of 71 x 82 mm giving 46 bhp (34 kW) @ 6,500 rpm.
Originally the race was called the Castrol 1000 in recognition of the prize money on offer from Castrol. $1000 was a considerable sum in 1970 as can be seen by the fact that the eventual winning bike in the first race, a Triumph Bonneville 650, could be purchased for around $1,150.00 at the time.
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