I own a hyosung 125 and would like to upgrade to a 250 cc engine. I live in Korea and have 2 options. (1) bore out to 160cc or (2)bolt on a suzuki GL 250 sleeve and piston etc. Aparantly it bolts straight on with no trouble at all. I read this on a forum sight but am unable to find the person who wrote it as it was several months ago. As i am living in Korea i am able to order parts from Japan. Im keen for a little more power as going any substantial distance at the moment means flogging the engine a little. PLease heeeeeeeeeeelp!