I recently bought a 87 savage and so far have no complaint. Lately what is happening I will start the bike and it take a few tries then it runs fine for about ten minutes of riding about 50mph. then it runs like it is out of gas. But it has a full tank. I recently tore the gas tank off replaced the plug, flushed the tank, replaced the fuel line, and cleaned the carb. today i pulled the petcock off and cleaned the filter but it is still running badly. Any help. Please...