Engine: Bore Stroke :81.0 mm x 62.6 mm , Compression Ratio :11.5 : 1 , Engine: 645 cc, 4-stroke, 2-cylinder, liquid-cooled, DOHC, 90-degree V-Twin , Fuel System: Fuel Injection, Ignition :Electronic ignition (Transistorized) , Lubrication :Wet sump , Starter :Electric,