I have a 2004 widfire ct70 . there is not 200 miles on it . it looks as new . I know the battery is dead, and I have a new one ordered. last fall it was running fine then it started to act up right before winter, I noticed that the plug wire had hit the exhaust pipe and appeared to have just melted the outside cover. I just put a plug wire splice kit on it and replaced the plug . the bike will start and run just fine for about 5 minutes , then it starts to miss and backfire and will stall out. it does start right back up , but still runs the same . . when the engine cools off it will run fine for a few minutes then does the same thing .. I had the carb off and checked the inlet screen and inside the float bowl, the appear as new, no dirt . could my carb be plugged up ?