My SR B carb stopped working. The stock tank is flowing fuel. It ran great until it stopped, so it’s not fuel delivery to the carb. The float will be full, but the carb is not delivering to the manifold. I’ve taken it apart several times and today I completely disassembled the carb and soaked it in the ultra sonic tank for a couple of hours. Does anybody know how to disassemble the check valve in the bottom of the bowel? Does anybody have any SR specific diagrams and instructions?