2013 Beta EVO 250 Specifications The Beta Evo 250 has a single cylinder 249.7cc two stroke engine that runs with a six speed transmission and a Keihin PWK carburetor. The fuel tank holds 0.75 gallons and that wheelbase is at 51.4 inches which helps with the maneuverability of the bike. A low seat height of 26 inches and a dry weight of 147 pounds make it easier to handle and control. Hariyono86.net