After every race pump all of the fuel out of the tail tank. unhook the the fuel lines and flow them out.. put the fuel shut off at approx 1//4 to 1/2 fuel flow and put pickle juice in the lines and blow it through the system.. take the bypasses apart each and every week and give them a good solid cleaning.. be sure to put pickle juice in the fule pump and turn it with an allen to move the pickle juice through the pump... MOST IMPORTANT OF ALL ONCE FINISHED CAP ALL LINES!!!!