Engine: Bore Stroke: 72.0 mm (2.835 in) x 61.2 mm (2.409 in) , Compression Ratio :9.0 : 1 , Engine: 249 cc (15.2 cu. in), 4-stroke, air-cooled, OHC , Fuel System :MIKUNI BSR32 , Ignition :Electronic ignition (Transistorized) , Lubrication :Wet sump , Starter :Electric ,