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					Technical specifications
					
				 | 
			
				| Model: | R 50 US | 
			
				| Years: | 1967-69 | 
			
			
					
						| Engine: | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | 
			
					
						| Capacity: | 494 cc / 30.1 cu in. | 
			
					
						| Bore x Stroke: | 68 x 68 mm | 
			
					
						| Compression Ratio: | 7.5:1 | 
			
					
						| Cooling System: | Air cooled | 
			
					
						| Induction: | 2 x Bing 1/24/45 - 1/24/46 carburetors | 
			
					
						| Ignition: | Battery ignition | 
			
					
						| Starting: | Electric & kick | 
			
					
						| Clutch: | Single plate saucer spring, dry | 
			
					
						| Max Power: | 19.4 kW / 26 hp @ 5800 rpm | 
			
					
						| Transmission: | 4 Speed | 
			
					
						| Final Drive: | Shaft | 
			
					
						| Gear Ratio: | 1st 4.17 / 2nd 2.73 / 3rd 1.95 / 4th 1.54:1 | 
			
					
						| Frame: | Double loop steel tubular frame | 
			
					
						| Front Suspension: | Telescopic fork | 
			
					
						| Rear Suspension: | Long swing arm with suspension units and oil pressure shock absorbers | 
			
					
						| Front Brakes: | ∅200mm Drum, duplex full hub | 
			
					
						| Rear Brakes: | ∅200mm Drum, simplex full hub | 
			
					
						| Front Tyre: | 3.50 -18" | 
			
					
						| Rear Tyre: | 4.00 -18" | 
			
					
						| Wet-Weight: | 195 kg / 429 lbs | 
			
					
						| Fuel Capacity: | 17 liters / 4.49 US gal |