hey guys, i have a brand new 08 hyosung gt250r that has about 670 miles on it. ever since i bought it, whenever i go at a constant speed of 65+ the bike stalls and rpm dies. i then have to turn on the choke and fight with it to start it back up. this only happens when i go over 65. i can drive all day under 65 but once i reach that speed, the bike stalls. can anyone help me?