The World Products RE2A-12S engine is a two-cylinder, four-stroke, air-cooled, overhead-cam engine. It has a 5.5 horsepower rating and a displacement of 188cc. This engine features dual overhead camshafts, and a single piston-ring design, with a piston diameter of 58mm and a stroke length of 58mm. It utilizes Electronic Fuel Injection (EFI) to deliver superior fuel efficiency, performance and giving it a clean, powerful sound. The RE2A-12S has a cast iron cylinder with a chrome-moly piston, and offers a maximum torque of 10.61 foot-pounds at 6500 RPM. This engine is a great choice for small recreational applications such as go-karts, or as a replacement engine for powering lawnmowers, snowblowers and other small power equipment.