[ndotken]

Several owners of '07s have complained about low RPM surges. It sounds to me like MoCo is concerned that either 1). these surges will damage the drive train during the warranty period ($$$ out of MoCo's pocket), or 2). someone will "surge" right into the back on a stopped vehicle or into an intersection full of oncoming traffic (BIG $$$ out of MoCo's pocket). The bikes are too lean in the low throttle range and about the only thing that gets the EPA-gestapo to relax their standard is a big safety issue.

My guess is that an "ECM calibration upgrade" is probably nothing more than enrichening the AFR setting in the low throttle range.