Engine type: in-line four-cylinder Capacity: 599cc Bore and Stroke: 67 mm x 42.5 mm Cooling: Liquid Compression ratio: 12.2: 1 Fuel System: Dual Stage Fuel Injection (DSFI) with 40mm Throttle Bodies, 12-hole Denso Injectors Ignition: Computer controlled digital transistor with 3-D mapping Transmission: six speed close ratio Final Drive: No. 525 O-Ring Chain; 16T / 42T bike still in very good condition and ready to go