Mbike - Catalogue. Community. Map.
Catalogue. Community. Map.
BSA A 50 Royal Star 1970
Air cooled, 498cc, Inline-2, OHV
| Power: | 32.77 HP (24.1 kW) @ 6500 rpm |
| Final drive: | Chain |
| Top speed: | 90.1 mph |
| Curb weight: | 425.5 lbs |
| Category: | Classic |
| Tags: | Classic bike |
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Engine and transmission
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| Engine type: | 2 cylinders, 4-stroke, Inline |
| Displacement: | 498 cc (30.43 cubic inches) |
| Bore × stroke: | 2.58 inch × 2.91 inch (undersquare - longstroke) |
| Cooling system: | Air cooled |
| Power: | 32.77 HP (24.1 kW) @ 6500 rpm |
| Throttle: | Cable operated |
| Valves | |
| Valve train: | OHV, variable |
| Valves per cylinder: | 2 |
| Fuel and ignition | |
| Sparks per cylinder: | 1 |
| Fuel supply system: | Carburetor |
| Ignition type: | mechanically timed |
| Compression: | 9:1 |
| Engine mounting: | Transverse |
| Lubrication system: | Wet sump |
| Gear box: | Manual 4-speed |
| Clutch: | Wet, multiple discs, cable operated |
| Final drive: | Chain |
| Spark plug pipe type: | NGK |
| Motor oil: | Mineral, 10W/40 |
| Starter: | Kick-starter |
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Dimensions
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| Weight | |
| Curb weight: | 425.5 lbs |
| Dry weight: | 392.4 lbs |
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Chassis and suspension
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| Frame type: | iron, Single cradle frame |
| Front | |
| Suspension: | Cartridge |
| Brake: | Single Drum |
| Tire: | 83 / 100 R19 |
| Tire pressure: | 0.12 PSI |
| Rear | |
| Suspension: | twin shock, Swingarm |
| Brake: | Drum |
| Tire: | 89 / 100 R19 |
| Tire pressure: | 0.14 PSI |
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Other
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| ABS available: | No |
| Power-to-weight ratio: | 0.12 KW/lbs (8.01 lbs/HP) |
| Acceleration (0-60 mph): | 7.8 sec |
| Top speed: | 90.1 mph |
| Fuel capacity: | 3.96 gals |
| Number of riders: | 2 persons |
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