| MODEL | BSA A65 SPITFIRE AND SPITFIRE SPECIAL 1966 - 1968 |
| Year | 1966 - 1968 |
| Engine Type | Four stroke, parallel twin cylinder, OHV, 2 valves per cylinder |
| Displacement / Capacity | 654 cc / 39.9 cu in |
| Bore X Stroke | 75 x 74 mm |
| Compression Ratio | 9.0:1 |
| Cooling System | Air cooled |
| Max Power | 40.0 kW / 53 hp @ 7000 rpm |
| Max Torque | — |
| Ignition | Coil, Lucas 3ET; Lucas RM19ET alternator |
| Induction | Amal Concentric 389/206 |
| Start System | Kick start |
| TRANSMISSION SPECS | |
| Lubrication | Dry sump |
| Gear Box | 4 speed |
| Clutch | Multi-plate with heavy duty springs |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Steel tubing, double cradle |
| Front Suspension | Telescopic forks with coil spring, hydraulically damped |
| Rear Suspension | Coil spring, hydraulically damped |
| Front Brakes | Drum, 8 in (20.3 cm), twin leading shoe |
| Rear Brakes | Drum, 7 in (17.8 cm) |
| DIMENSION SPECS | |
| Overall Length | 2165 mm / 85.3 in |
| Overall Width | — |
| Overall Height | 1117 mm / 44.0 in |
| Seat Height | 813 mm / 32 in |
| Wheelbase | 1410 mm / 55.5 in |
| Ground Clearance | 203 mm / 8.0 in |
| Dry Weight | — |
| Wet Weight | 185 kg / 408 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.25 x 19 in |
| Rear Tyre | 4.00 x 18 in |
| FUEL SYSTEM | |
| Fuel Capacity | 18 Litres / 4.8 US gal (Europe); 9 Litres / 2 US gal (US) |
| Fuel Consumption | — |
| Top Speed | 212 km/h / 132 mph |
The Spitfire was BSA's high-performance 650 twin of the mid-1960s, with high-compression pistons and a hotter cam than the Lightning. The Mk II brought twin Amal GP carburettors and better damping, the Mk III switched to Concentrics and a bigger tank, and the Mk IV added a twin-leading-shoe front brake and more power.
