Triumph THUNDERBIRD 6T: history, specs, pictures
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| Triumph THUNDERBIRD 6T | |
| Manufacturer | |
|---|---|
| Production | 1950 - 1954 |
| Class | Classic |
| Engine | Air-cooled OHV vertical twin, non-unit |
| Bore / Stroke | 71.1mm x 71.1mm |
| Compression ratio | 8.5:1 |
| Horsepower | 34.06 HP (25.4 KW) @ 6500RPM |
| Fuel System | Carburetor: 1-SU Type MC2 |
| Transmission | Gear box: 4-Speed, constant mesh Final Drive: Chain |
| Suspension | Front: Telescopic fork, hydraulic damping Rear: Swing arm, 2 Girling dampers |
| Brakes | Front: Drum Rear: Drum |
| Front Tire | 3.25" X 19" |
| Rear Tire | 3.50" X 19" |
| Wheelbase | 55.79 inches (1417 mm) |
| Seat Height | 30.98 inches (787 mm) |
| Weight | 184.0 kg (wet) |
| Fuel Capacity | 0.79 Gallon (3.00 Liters) |
| Manuals | Service Manual |
The Triumph THUNDERBIRD 6T was a Air-cooled OHV vertical twin, non-unit Classic motorcycle produced by Triumph between 1950 and 1954. Claimed horsepower was 34.06 HP (25.4 KW) @ 6500 RPM.
Engine[edit | edit source]
A 71.1mm bore x 71.1mm stroke result in a displacement of just 649.0 cubic centimeters.
Drive[edit | edit source]
The bike has a 4-Speed, constant mesh transmission. Power was moderated via the Wet multi plate.
Chassis[edit | edit source]
It came with a 3.25" X 19" front tire and a 3.50" X 19" rear tire. Stopping was achieved via Drum in the front and a Drum in the rear. The front suspension was a Telescopic fork, hydraulic damping while the rear was equipped with a Swing arm, 2 Girling dampers. The THUNDERBIRD 6T was fitted with a 0.79 Gallon (3.00 Liters) fuel tank. The wheelbase was 55.79 inches (1417 mm) long.
1950 - 1953 Triumph THUNDERBIRD 6T[edit | edit source]
The 1950 Triumph Thunderbird was not only the first Thunderbird, it was the first Triumph 650 it began a long legacy that lasted until the demise of Triumph Motorcycles in 1983. Another interesting feature was the crankshaft shock absorber. Introduced with the 1950 T-Bird, it remained in service until the conversion to alternator electrics in 1953, which was now mounted in its place on the left end of the crank, inside the primary cover.
1954 - 1962 Triumph THUNDERBIRD 6T[edit | edit source]
1954 was a big year at Triumph Motorcycles, in general. Finally the archaic rigid frame and troublesome sprung rear hub were ditched for a proper swing arm frame.