| 
					Technical specifications
					
				 | 
			
				| Model: | R 61 | 
			
				| Years: | 1938-41 | 
			
			
					
						| Engine: | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | 
			
					
						| Capacity: | 600 cc / 36.6 cu in. | 
			
					
						| Bore x Stroke: | 70 x 78 mm | 
			
					
						| Compression Ratio: | 5.7:1 | 
			
					
						| Cooling System: | Air cooled | 
			
					
						| Induction: | 1x Amal M75/426 S carburetor | 
			
					
						| Ignition: | Battery ignition | 
			
					
						| Starting: | Kick | 
			
					
						| Clutch: | Single plate, dry | 
			
					
						| Max Power: | 13.4 kW / 18 hp @ 4800 rpm | 
			
					
						| Transmission / Drive: | 4 Speed | 
			
					
						| Gear Ratio: | 1st 3.6 / 2nd 2.28 / 3rd 1. 7 / 4th 1.3:1 | 
			
					
						| Frame: | Twin loop steel tubular frame | 
			
					
						| Front Suspension: | Telescopic fork | 
			
					
						| Rear Suspension: | Telescopic suspension | 
			
					
						| Front Brakes: | ∅200mm Drum | 
			
					
						| Rear Brakes: | External shoe brake at the gearing on Cardan shaft | 
			
					
						| Front Tyre: | 3.00 -19" | 
			
					
						| Rear Tyre: | 3.50 -19" | 
			
					
						| Wet-Weight: | 184 kg / 405 lbs | 
			
					
						| Fuel Capacity: | 14 liters / 3.6 US gal |