I have a 2004 ST3 that I am the third owner. Back in 2005, Ducati issued a service bulletin to replace the ECU and exhaust valve return springs. My ST3 does have the newer ECU, but I need to know if the springs have also been changed. I plan to perform a compression test and would like to know whether a good test result indicate that these springs are working properly. If this test would not confirm that the correct springs are installed, how else can I be able to tell that the correct springs are in there?