V型2気筒
The GT250R comes stock with a 249 cc V-twin engine. The Hyosung V-twin engine was designed in Hamamatsu Japan by a design team consisting of engineers who have previously worked in the research and development teams of Suzuki. Technical features include roller bearing camshafts, two-piece spring dampened bevel silent primary drive gears, dual squish combustion chambers. It utilizes a DOHC eight-valve engine configuration. Twin downdraft Mikuni carburetors were standard until 2008, when fuel injection became available. "Cycle World" tested the GT250R's acceleration at in 7.6 seconds and in 16.06 seconds at .