AJS Model 31 650 Swift vs BSA Golden Flash (1966)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the AJS Model 31 650 Swiftstacks up against the BSA Golden Flash. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | AJS Model 31 650 Swift | BSA Golden Flash |
|---|---|---|
| Model year | 1966 | 1961 |
| Price | — | — |
| Engine | 646 cc | 646 cc |
| Horsepower | 31 hp | 35 hp |
| Weight | 176 kg | 190 kg |
| Fuel capacity | 4.2 L | 5.0 L |
| Fuel type | petrol | petrol |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
AJS Model 31 650 Swift vs BSA Golden Flash — which should you buy?
Picking between the AJS Model 31 650 Swift and the BSA Golden Flash usually comes down to the numbers you care about most. On paper, the AJS Model 31 650 Swift brings 31 hp in a 176 kg package, while the BSA Golden Flash counters with 35 hp at 190 kg.
Our spec tables above highlight the winning number on each line. For the full rider-focused reviews including real-world fuel economy, service costs and available colors, click into either bike: