| MODEL | BSA M22 500 1937 |
| Year | 1937 |
| Engine Type | Four-stroke, single-cylinder, OHV |
| Displacement / Capacity | 496 cc / 30.3 cu in |
| Bore X Stroke | 81 x 94 mm |
| Compression Ratio | — |
| Cooling System | Air-cooled |
| Max Power | 16 kW / 22 hp |
| Max Torque | — |
| Ignition | Magdyno |
| Induction | — |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | Dry sump (3.4 L oil) |
| Gear Box | 4-speed, constant mesh |
| Clutch | Multi-plate, dry |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Triangulated cradle with sidecar lugs |
| Front Suspension | Fork with shock absorber and steering damper |
| Rear Suspension | None (spring-loaded saddle) |
| Front Brakes | Drum, 7 in |
| Rear Brakes | Drum, 7 in |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 724 mm / 28.5 in |
| Wheelbase | 1372 mm / 54 in |
| Ground Clearance | 120 mm / 4.7 in |
| Dry Weight | — |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.25 x 19 in |
| Rear Tyre | 3.25 x 19 in |
| FUEL SYSTEM | |
| Fuel Capacity | 13.6 Litres / 3.6 US gal |
| Fuel Consumption | — |
| Top Speed | — |
A 500 cc overhead-valve single from Val Page's 1937 line-up, sitting above the M19 350. It used the new dry-sump engine and a triangulated frame with sidecar lugs.
