1946 Triumph Speed Twin
1946 TRIUMPH SPEED TWIN – IN WAR & PEACE
World War II had been hard on England. British motorcycle manufacturers like Triumph and BSA, did well during the war selling side-valve singles to the Army and lots of other stuff. But, war is hell, right? In 1940, the Germans bombed the Triumph factory. The bad news turned into good news however when the government paid to have a modern new factory built in the Midlands, which became the famous Meriden plant. At war’s end, Triumph quickly ramped up civilian production again and the 1946 Triumph 5T Speed Twin was its best seller. The revenues generated by the Speed Twin lifted Triumph out of the doldrums and put it on the path of financial success.
1946 TRIUMPH SPEED TWIN DESIGN
The 500cc Speed Twin had launched as a 1938 model, but the War quickly intervened. Now that civilian production renewed after the war, the 1946 Speed Twins more or less carried over from the pre-war bikes, with the exception of the front forks. Prior to the war, they used girder-style front forks. Post-war, Triumph fitted their bikes with modern telescopic forks. A huge improvement in both ride and handling, especially under heavy braking. Otherwise, it still used the same old rigid frame, and the engine/gearbox remained unchanged from before. It still used a cast iron cylinder block and head, fed by a single Amal carburetor. The Speed Twin
1946 Triumph Speed Twin SPECIFICATIONS
Model Designation Engine Number prefix Engine Type Displacement Bore & Stroke Compression ratio Carburetor Engine output Top Speed Electrical system Primary drive Clutch Gearbox Final drive Frame construction Suspension, front Suspension, rear Brake, front Brake, rear Wheel, front Wheel, rear Wheelbase Seat height Ground clearance Fuel capacity Weight |
Triumph 5T Speed Twin 46-5T Air-cooled OHV vertical twin 498cc 63mm X 80mm 6.5:1 one- Amal 15/16″ 28 bhp @ 6,000 rpm 85-90 mph 6-volt, Lucas magdyno Chain Multi-plate, wet 4-speed constant mesh, right-foot shift Chain Steel tube, brazed lug Telescopic Rigid 7-inch SLS drum 7-inch SLS drum 3.25″ X 19.0″ 3.50″ X 19.0″ 54.0″ 29.5″ 6.0″ 4 Imp gal 361 lbs, dry |
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