Finally, Suzuki has seen the error of its ways and brought back the SV650. The familiar 645cc, DOHC, 90-degree V-twin has been upgraded with more than 60 new parts to increase output (from 71 to 75 horsepower) and improve fuel efficiency. New, FEM-designed pistons are strong and lightweight, with resin-coated skirts that reduce friction in the plated cylinders. The SDTV EFI system with 39mm throttle bodies and 10-hole injectors has been upgraded to allow better low-speed running, and inhales though a new airbox with staggered intake funnels for improved torque. Dual-spark ignition and a lightweight, catalyst-equipped 2-into-1 exhaust help the engine meet stringent Euro 4 emissions standards. A new radiator with a larger cooling fan works with a liquid-cooled oil filter to keep engine temperature in check.