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Triumph TR6 Trophy

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Make Model

Triumph TR6 Trophy

Year

1956 - 60

Engine

Four stroke, parallel twin

Capacity

649 cc / 39.6 cu in
Bore x Stroke 71 x 82 mm
Compression Ratio 8.5:1 (US and export) / 7.0:1 (UK)
Cooling System Air cooled

Induction

Single Amal Monobloc carburetor

Ignition

Lucas magneto

Starting

Kick

Max Power

31.3 kW / 42 hp @ 6500 rpm

Clutch

Wet, multi-plate

Transmission

4-Speed

Final Drive

Chain, 101 links

Gear Ratios

1 st 11.2 / 2nd 7.8 / 3rd 5.5 / 4th 4.6:1

Frame

Brazed lug, rigid

Front Suspension

Telescopic fork, hydraulic damping

Rear Suspension

Swing arm, 2 x Girling dampers

Front Brakes

178 mm / 7" SLS drum

Rear Brakes

178 mm / 7" SLS drum

Front Tyre

3.25 x 19 Dunlop

Rear Tyre

4.00 x 18 Dunlop

Dry Weight

166 kg / 365 lbs

Wet Weight

173 kg / 380 lbs

Dimensions

Length: 2140 mm / 84 in
Width:  700 mm / 27.5 in

Wheelbase

1397 mm / 55 in

Ground Clearance

127 mm / 5.0 in

Seat Height

775 mm / 30.5 in

Fuel Capacity 

US: 13.6 L / 3.6 US gal / 3 Imp gal / UK and export: 18 L / 4.8 US gal / 4 Imp gal

With the new cylinder head came an all new motorcycle, indeed an all new type of motorcycle, the 1956 Triumph TR6 Trophy. It was a dual-purpose bike, street legal but offroad-capable with knobby tires, minimal fenders (mudguards) & high pipes. The TR6 was clearly intended for the wide open spaces of America and the burgeoning off-road & desert racing market in the US (although it was also available in the UK and other export markets).

One interesting feature came with the elimination of the Tiger and T-Bird twins' clunky headlight nacelle. The 1956 Triumph TR6 came with a sleek, tidy removable headlight with detachable wiring & even a detachable dynamo. The 1956 Triumph TR6 shared much with its smaller brother, the 500cc TR5. These included the primary chaincase, detachable dyno, oil tank, and slim dual seat. The 3-gallon fuel tank and siamesed 2-into-1 side exhaust running high along the left side (two side pipes, one on each side, became available late in the model year) completed the off-road package. Was it effective as a dirt bike? Well, at the prestigious 1957 Big Bear Run Enduro in California, TR6 Trophies took no less than the first 12 places overall!! The TR6 legend was off & running.

Source: Classic British Motorcycles