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 |
