There's a misconception about when you upgrade from the old gray plastic body (crack-o-matic coil) to the new red plastic body OEM coil . It is widely rumored that you need to replace the ignition control unit, when you upgrade to the new coil. My personal experience is, I replaced my original coil with the upgraded model in June 1994, I didn't replace the ignition control unit then, I replaced the upgraded coil last November with a Dyna (brown coil). I have not had a problem with the ignition unit so far. I think that I operate my R65 in one of the more severe environments available, the desert heat of Phoenix should have brought out a problem by now ( 14 years) if this rumor was true.