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					Technical specifications
					
				 | 
			
				| Model: | XJ 650 Seca | 
			
				| Years: | 1981 | 
			
			
					
						| Engine: | Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder, | 
			
					
						| Capacity: | 653 cc / 39.8 cu-in | 
			
					
						| Bore x Stroke: | 63 х 52.4 mm | 
			
					
						| Cooling System: | Air-cooled | 
			
					
						| Compression Ratio: | 9.2:1 | 
			
					
						| Induction: | 4x 32mm Hitachi carburetors | 
			
					
						| Ignition: | Transistorized | 
			
					
						| Starting: | Electric | 
			
					
						| Max Power: | 71 hp / 51.8 kW @ 9400 rpm | 
			
					
						| Max Torque: | 57 Nm / 42 lb-ft @ 7500 rpm | 
			
					
						| Clutch: | Wet Multiplate; 7 Steel 8 Friction | 
			
					
						| Transmission: | 5 Speed | 
			
					
						| Final Drive: | Shaft | 
			
					
						| Gear Ratio: | 1st 2.187 (35/16) 2nd 1.500 (30/20) 3rd 1.153 (30/26) 4th 0.933 (28/30) 5th 0.812 (26/32) | 
			
					
						| Frame: | Tubular steel dual cradle frame | 
			
					
						| Front Suspension: | 36mm Kayaba forks | 
			
					
						| Front Wheel Travel: | 142 mm / 5.5 in | 
			
					
						| Rear Suspension: | Duel Kayaba shocks | 
			
					
						| Rear Wheel Travel: | 93 mm / 3.6 in | 
			
					
						| Front Brakes: | 2x 268mm disc 1 piston calipers | 
			
					
						| Rear Brakes: | Drum | 
			
					
						| Front Tyre: | 3.25-19 | 
			
					
						| Rear Tyre: | 120/90-18 | 
			
					
						| Wheelbase: | 1445 mm / 56.8 in | 
			
					
						| Seat Height: | 780 mm / 30.7 in | 
			
					
						| Ground Clearance: | 145 mm / 5.7 in | 
			
					
						| Dry Weight: | 206 kg / 465 lbs | 
			
					
						| Fuel Capacity: | 19.5 Litres / 5.1 US gal | 
			
					
						| Consumption Average: | 48.6 mpg | 
			
					
						| Standing ¼ Mile: | 12.6 sec. / 171 km/h |