What he said. I bought two used ECUs chasing the knock sensor, and it was a decision I regret. I ended up getting a new one, and all is well. As for changing the alternator, I think I invented new curse words for that thing. That bottom bolt is a b.......h!!!! I do not want to do it again.I assume with an '08 bike this is not a warranty repair. There is no reason to send the ECU back to Honda or any other provider as it cannot be repaired. If I were you, I would insist that the ECU replacement be a new one and not a used one from some wrecking yard that you have no idea if it is good or bad or how long it might last before it fails.