I just pruchased a Universal 6v H.T. Coil from www.mopedwarehouse.com, since I was missing the one from my 1976 Motobecane Cady. While I was reading over the serice manual I noticed that there was something inside the plug cap called a supressor. Do I need a specific Motobecane cap or no. Could I just pick one up at an auto parts store. Thanks.