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					Technical specifications
					
				 | 
			
				| Model: | Speed Twin 500 | 
			
				| Years: | 1938-46 | 
			
			
					
						| Engine: | Four stroke, parallel twin, OHV | 
			
					
						| Capacity: | 498 cc / 30.4 cub in. | 
			
					
						| Bore x Stroke: | 63 x 80 mm | 
			
					
						| Compression Ratio: | 7.1:1 | 
			
					
						| Cooling System: | Air cooled | 
			
					
						| Induction: | Single Amal carburetor | 
			
					
						| Ignition: | 6 V, magnetic flywheel | 
			
					
						| Starting: | Kick | 
			
					
						| Max Power: | 20.9 kW / 28 hp @ 6000 rpm | 
			
					
						| Clutch: | Wet, 6 plate | 
			
					
						| Transmission: | 4 Speed | 
			
					
						| Final Drive: | Chain | 
			
					
						| Frame: | Singe tube frame | 
			
					
						| Front Suspension: | Rigid fork with leaf spring | 
			
					
						| Rear Suspension: | Rigid, spring loaded saddle | 
			
					
						| Front Brakes: | Drum | 
			
					
						| Rear Brakes: | Drum | 
			
					
						| Front Tyre: | 3.25 - 19 | 
			
					
						| Rear Tyre: | 3.50 - 19 | 
			
					
						| Dry Weight: | 182 kg / 401 lbs | 
			
					
						| Fuel Capacity: | 18 L / 4.8 US gal / 4.0 Imp gal |