The factory has always passed along fixes for free if they think they will help. First the delay circuit, helped some, then the resistors, helped a lot, now the new ignition. If you order a bike, tell you dealer you want to make sure it has one. (This is new enough your dealer may not even know about it, but you faithfull forum watchers usually know things first). If you have an earlier model it is sort of up to you. Not all bikes have sprag issues. In fact most don't, but how do you know if you will or won't? There is no good way to predict this. It defies logic (other than those with loose bushings).
We are making it available free because it seems to be the best insurance against a sprag failure. Most of you won't need it, but if it were me I would put one in just to be sure. It is an easy half hour install, anyone can so it etc. In spite of us selling old technology bikes, Royal Enfield as a company really does care about it's customers. They have come up with this all on their own and are willing to provide them as a courtesy and as an act of goodwill. As a note, this does not apply to iron barrel bikes which have points ignition. If you want one call us.