Triumph TR6 Trophy (1956-60)

The Triumph TR6 Trophy was a motorcycle produced from 1956 to 1960. It featured a four-stroke, parallel-twin engine with a capacity of 649cc and a compression ratio of 8.5:1 for US and export markets and 7.0:1 for the UK. The bike had a maximum power output of 31.3 kW or 42 hp at 6500 rpm, and a wet weight of 173 kg or 380 lbs. It had a brazed lug, rigid frame, telescopic fork front suspension with hydraulic damping, and swing arm rear suspension with two Girling dampers. The front and rear brakes were both 178 mm SLS drum brakes, and the bike had a chain final drive with 101 links. The TR6 Trophy had a length of 2140 mm or 84 in, width of 700 mm or 27.5 in, wheelbase of 1397 mm or 55 in, and ground clearance of 127 mm or 5.0 in. The seat height was 775 mm or 30.5 in and the fuel capacity varied depending on the market, with the US version holding 13.6 L or 3.6 US gal / 3 Imp gal and the UK and export version holding 18 L or 4.8 US gal / 4 Imp gal.

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Technical specifications:

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