| MODEL | BMW R 25/3 1953 - 1956 |
| Year | 1953 - 1956 |
| Engine Type | Four stroke, single cylinder, pushrod operated OHV, 2 valves per cylinder |
| Displacement / Capacity | 247 cc / 15.1 cu in |
| Bore X Stroke | 68 x 68 mm |
| Compression Ratio | 7.0:1 |
| Cooling System | Air cooled |
| Max Power | 9.6 kW / 13 hp @ 5800 rpm |
| Max Torque | — |
| Ignition | Battery ignition |
| Induction | 1x Bing type 1/24/41 or SAWE type K24F |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4 Speed |
| Clutch | Single plate, dry |
| Final Drive | Shaft |
| CHASSIS SPECS | |
| Frame | Closed steel twin loop frame, welded |
| Front Suspension | Telescopic fork, hydraulically damped |
| Rear Suspension | Plunger (straight-line) suspension |
| Front Brakes | 160 mm full-hub drum |
| Rear Brakes | 160 mm full-hub drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 150 kg / 331 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.25 x 18 |
| Rear Tyre | 3.25 x 18 |
| FUEL SYSTEM | |
| Fuel Capacity | 12 Litres / 3.2 US gal |
| Fuel Consumption | 2.9 L/100 km |
| Top Speed | 119 km/h / 74 mph |
Unlike the cosmetic R 25/2 update, the R 25/3 was a thorough redesign with a new tank, a hydraulically damped long-travel fork, light-alloy full-hub brakes and 18-inch alloy rims. With 13 hp it was quicker than before, and around 47,700 were sold, making it one of BMW's best-selling motorcycles.
