I am enjoying my recently bought 2005 Bonnie on the odd dry day that I've had a chance to try it out even if it is damn cold! I will want to beef it up eventually though and will end up getting a 902 kit from Norman Hyde when funds allow. For now though I am looking to convert to K&N air filters, a "less restrictive" exhaust and jetting to suit. I have heard that you can get an upgraded ECU that will improve power? I am very ignorant regarding these new fangled gizzmo's and don't understand how these black boxes work so I've obviously even less idea how one could be better than the other? Can anyone explain in the simplest of terms please?