And now this, on my never ending problem chasing. With the tank off my bike and the fuel lines disconnected, when I turn the petcock to on no fuel comes out of either nipple. When I turn the petcock to reserve, fuel comes out of the nipple closest to the carbs. I have read where one side will flow better than the other but neither flows when the petcock is in the on position and only one flows when on reserve. Any ideas?