alright, for my birthday my parents got me a baja mini, ( http://images.canadianlisted.com/nlarge/baja-mini-bike_4911730.jpg ) from my moms friend, it worked perfectly and still does, except it smokes when i start it, and it usually doesn't, it smokes my the pull cord, and whenever I give it some gas,(try to move forward) it smokes even harder! please help me, i'm scared to sh*t because I don't want it to blow up OR to die, all though I might be over reacting.