In this group of tiny two-wheelers, the Hyosung is a giant. Unlike many other 250-cc bikes, which are built on shrunken­ frames to fit smaller engines, the GT250 uses the same chassis as a full-size GT650. It's like a Korean version of a Ducati Monster, but includes some rough spots. The front brake feel is mushy, and it takes a fistful of lever to slow down the bike. And while the fuel-injected twin does pack reasonably good punch and sounds throaty, the engine's vibration buzzes the handlebars.