The BMW R12 Twin carb motorcycle specifications include a 745 cc (45.46 cu in) engine, power of 20 hp (14.6 kW) @ 4,000 rpm, a 4-speed gearbox, and a listed weight of 185 kg (407.9 lb).
Key specifications
Year-specific specification changes
How the BMW R12 Twin carb compares
This compares the motorcycle with all BMW models in this specifications database. The blue marker is this model and the grey line is the BMW database average.
About 75% lower than the BMW database average. Around the 9th percentile across BMW models.
About 18% lower than the BMW database average. Around the 34th percentile across BMW models.
About 18% lighter than the BMW database average. Around the 14th percentile across BMW models.
About 27% smaller than the BMW database average. Around the 15th percentile across BMW models.
BMW database percentile rankings
Percentiles show where this motorcycle sits across the BMW specifications database. They are descriptive database rankings, not performance ratings.
20 hp — more powerful than about 9% of BMW models with power data.
745 cc — larger displacement than about 34% of BMW models.
185 kg — heavier than about 14% of BMW models, or lighter than about 86%.
14 L — larger than about 15% of BMW fuel tanks in this database.
Dimensions compared with BMW average
Each measurement is compared with the average value across BMW models where that dimension is available.
2,100
2,193
4% below average.
900
877
Close to average.
940
1,199
22% below average.
Mechanical overview
Additional useful specifications
| Front tire size | 3.50-19 |
|---|---|
| Rear tire size | 3.5-19 |
| Estimated theoretical fuel range | 311 km |
| Power-to-weight ratio | 0.108 hp/kg |
| Power-to-weight | 108.1 hp/tonne |
| Specific power | 26.8 hp/L |
| Bore/stroke ratio | 1.00:1 (Square) |
Engine specifications
| Engine type | Two cylinder boxer, four-stroke |
|---|---|
| Displacement | 745 cc (45.46 cu in) |
| Power | 20 hp (14.6 kW) @ 4,000 rpm |
| Bore × stroke | 78.0 x 78 mm (3.1 x 3.1 inches) |
| Compression ratio | 5.2:1 |
| Cooling system | Air |
| Fuel system | Carburettor. Amal |
| Fuel control | Overhead Valves (OHV) |
| Starter | Kick |
| Lubrication | Wet sump |
Transmission and drivetrain
| Gearbox | 4-speed |
|---|---|
| Clutch | Dry multiplate-cable operated |
Chassis and suspension
| Frame | Steel-doble cradle |
|---|---|
| Front suspension | Cartrige |
| Rear suspension | Rigid- |
Brakes, wheels and tires
| Front brakes | Expanding brake (drum brake). Single |
|---|---|
| Rear brakes | Expanding brake (drum brake) |
| Front tire | 3.50-19 |
| Rear tire | 3.5-19 |
Dimensions and weight
| Wet weight | 185 kg (407.9 lb) |
|---|---|
| Overall length | 2,100 mm (82.7 inches) |
| Overall width | 900 mm (35.4 inches) |
| Overall height | 940 mm (37.0 inches) |
| Carrying capacity | 300 |
Fuel and emissions
| Fuel capacity | 14.00 L (3.70 US gal) |
|---|---|
| Fuel consumption | 4.50 L/100 km (22.2 km/l or 52.27 mpg) |
| Greenhouse gases | 104.4 CO 2 g/km. (CO2 – Carbon dioxide emission) |
Performance
| Top speed | 120.0 km/h (74.6 mph) |
|---|
Other specifications
| Seat | Spring-mounted seat |
|---|
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from BMW models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official BMW information before relying on them. Visit the official BMW website.