The BSA A65 Firebird Scrambler and Firebird SS were produced between 1968 and 1971. These motorcycles had a four-stroke, parallel twin, OHV engine with a capacity of 654 cc and a bore and stroke ratio of 75 x 74 mm. The bike also featured twin Amal monobloc 389/67 carburetors, high-level chrome exhaust, and twin coil Lucas 4CA ignition. The starting was done with kick start and the bike had a two 12V, 10 a.h. Lucas RM19 battery. The bike had a maximum power of 38 hp at 5800 rpm in 1968 and 49 hp at 7000 rpm in 1970. The BSA A65 Firebird Scrambler and Firebird SS had a multi-plate, wet clutch, and a 4-speed transmission with a final drive chain. It had steel tubing cradle, telescopic forks with coil spring-hydraulically damped, swing arm rear suspension with coil springs/hydraulically damped, and steel wire-spoked wheels. The front brakes were 20.32 cm/8 in. drum SLS, and the rear brakes were 17.78 cm/7 in. drum SLS. The BSA A65 Firebird Scrambler and Firebird SS had a wet weight of 184 kg/406 lbs and a top speed of 169 km/h and 105 mph. The fuel capacity of this bike was 18 L/4.8 US gal in Europe and 9 L/2.4 US gal in the US.
Technical specifications:
Make Model: BSA A65 Firebird Scrambler and Firebird SS
| Year | 1968 – 71 |
|---|---|
| Engine | Four stroke, parallel twin, OHV |
| Capacity | 654 cc / 39.9 cub in. |
| Bore x Stroke | 75 x 74 mm |
| Carburetors | Twin Amal monobloc 389/67 |
| Cooling System | Air cooled |
| Compression Ratio | 9.0:1 |
| Lubrication | Dry sump |
| Engine Oil | SAE 20W50 |
| Oil Capacity | 3.4 L / 6 pints / 0.9 US gal |
| Exhaust | Twin, high level, chrome |
| Ignition | Twin coil, Lucas 4CA |
| Spark Plug | Champion N4 |
| Battery | 2 x 12V, 10 a.h., Lucas RM19 |
| Starting | Kick start |
| Max Power | 1968: 27.9 kW / 38 hp @ 5800 rpm 1970: 35.9 kW / 49 hp @ 7000 rpm |
| Clutch | Multi-plate, wet |
| Transmission | 4 Speed |
| Final Drive | Chain |
| Gear Ratio | 1st 11.10 / 2nd 7.18 / 3rd 5.13 / 4th 4.35:1 |
| Frame | Steel tubing, cradle |
| Front Suspension | Telescopic forks with coil spring – hydraulically damped |
| Rear Suspension | Swing arm, coil springs/hydraulically damped |
| Front Brakes | 20.32 cm / 8 in., drum, SLS |
| Rear Brakes | 17.78 cm / 7In., drum, SLS |
| Wheels | Steel, wire spokes |
| Front Rim | WM2-18 |
| Rear Rim | WM2-18 |
| Front Tyre | 3.25 x 18 in. |
| Rear Tyre | 1968: 3.50 x 18 in. 1970: 4.00 x 18 in |
| Dimensions | Length: 2060 mm / 81.0 in. Width: 711 mm / 28 in. |
| Wheelbase | 1372 mm / 54 in. |
| Ground Clearance | 178 mm / 7.0 in. |
| Seat Height | 838 mm / 33 in. |
| Wet Weight | 184 kg / 406 lbs |
| Fuel Capacity | Europe:18 L / 4.8 US gal US: 9 L / 2.4 US gal |
| Top Speed | 169 km/h / 105 mph |
