While I have few if any complaints regarding the Motronic 2.4 on my '01 GS, I believe there are ways to eliminate detonation which occurs frequently on boxers of this vintage.
If I'm not mistaken, H-D uses a Delphi ECU which employs spark ionization to determine when detonation is occurring. During detonation, the impedance across the spark plug gap increases dramatically providing immediate warning of detonation, thus allowing instantaneous adjustment of fuel and timing to eliminate the detonation. Is is seamless and eliminates any need for knock sensor hardware.
Also, how about throttle by wire....I am surprised that BMW has not done this already. With such a scheme, throttling the boxer could be tailored by adjusting slew rates, tip in and tip out rates, etc.
TB sync could be incorporated easily into such a scheme.
What say you Poolside, JJ?