I just bought this bike and the 1st night I had it I filled her up with premium gas, didn´t ride her for a few days as I was waiting for my helmet to arrive. Went to start her and no go, looked in gas tank and found that the liner had come apart inside; cleaned it out, relined it and did the carbs. Still won´t start, starts to turn over but doesn´t catch, backfires and then makes a clacking noise. Bought new battery, no go... any ideas? I just want to ride her and it´s killin me to see her sitting there...