Triumph TR65 Thunderbird (1981)

The Triumph TR65 Thunderbird motorcycle was manufactured in 1981 and has a four stroke parallel twin cylinder engine with a capacity of 649 cc. It has a bore x stroke of 76 x 71.5 mm and a compression ratio of 8.6:1. The bike is air cooled and features a single 30 mm Amal carburetor. The maximum power output is 31.3 kW / 42 hp at 6500 rpm and the maximum torque is 50.1 Nm / 5.1 kgf-m / 37 ft-lb at 5500 rpm. The transmission is a 5 speed and the final drive is a chain. The front suspension is a telescopic fork and the rear suspension features dual Girling shocks with 5-way preload adjustment. The front brake is a single 250 mm disc and the rear brake is a 178 mm drum. The bike weighs 185 kg / 408 lbs and has a length of 2220 mm / 87.4 in with a wheelbase of 1422 mm / 60.0 in. The seat height is 787 mm / 31.0 in and the fuel tank capacity is 18.2 L / 4.8 US gal / 4.0 Imp gal. The average consumption is 5.2 L/100 km / 45 US mpg / 54 Imp mpg.

Technical specifications:

Make Model: Triumph TR65 Thunderbird

Year: 1981
Engine: Four stroke, parallel twin cylinder, OHV
Capacity: 649 cc / 39.6 cu in
Bore x Stroke: 76 x 71.5 mm
Compression Ratio: 8.6:1
Cooling System: Air cooled
Induction: Single 30 mm Amal carburetor
Starting: Kick
Max Power: 31.3 kW / 42 hp @ 6500 rpm
Max Torque: 50.1 Nm / 5.1 kgf-m / 37 ft-lb @ 5500 rpm
Transmission: 5 Speed
Final Drive: Chain
Front Suspension: Telescopic fork
Rear Suspension: Dual Girling shocks, 5-way preload adjustment
Front Brakes: Single 250 mm disc
Rear Brakes: 178 mm Drum
Front Tyre: 3.25-19
Rear Tyre: 4.00-18
Wet Weight: 185 kg / 408 lbs
Dimensions: Length: 2220 mm / 87.4 in
Wheelbase: 1422 mm / 60.0 in
Seat Height: 787 mm / 31.0 in
Fuel Capacity: 18.2 L / 4.8 US gal / 4.0 Imp gal
Consumption Average: 5.2 L/100 km / 45 US mpg / 54 Imp mpg