ian1981

hi there,please .please can somebody help me.im the proud but frustrated owner of a yamaha sr125.today i turned her over and straight away she sounded abit bunged up.i gave her a few revs to try to warm her up and when the time came to leave for work i realised something was wrong,shes all spluttery and when im travelling she vibrates,shakes and generally sounds like shes going to explode.it feels like shes dying to back fire and i cant seem to get her over 30mph without being fearful for my life lol.please can anyone help??id very much appreciate it.thanks alot