Sorry mate but i obvioulsy dont understand what your getting at. Ignition systems i think you are on about. Allow you to change the advance or retard ie if your running low or high compresion such as a turbo, or running nitrous, where the ignitiion is timed differnetly. Or changing gear for example. They can also allow multiple sparks. They can also protect the engine against detonation, set rpm limits. They also allow set fixed ignition curves, so in theory you can run the bike differntly for track day than on the road at a touch of a button. Some also tell you top dead centre. My uncle who used to ride gp would be able to explain better, so will try to get hold of him as he has bored me to death about ignitions before. But like i said before unless you are a serous racer on a serious bike you wouldnt notice the difference. There are more things you can spend your money on to get bigger bhp improvements than changing your ignition.