Interesting reason
On the two wheeled side, passing EPA regs usually means leaning things out until the motor does not run right anymore. (At one time, a certain US company's products were downright dangerous to ride because of it.)
So the next question becomes, what happens to you if you forego the "fix"? The local inspection stations are likely not going to be able to pick that up unless the fixed cars are painted blaze orange. 50 state regs, so YMMV, but up here in the sticks, very unlikely. Lets see how many of these ever make it back to a dealership. (This has shades of an issue with Radio Shack scanners, back when cell phones first came out. The originals could pick up the [unencrypted] 800 MHz cell band. Units sent in for repair came back minus the upper end of their range.)
So the next question becomes, what happens to you if you forego the "fix"? The local inspection stations are likely not going to be able to pick that up unless the fixed cars are painted blaze orange. 50 state regs, so YMMV, but up here in the sticks, very unlikely. Lets see how many of these ever make it back to a dealership. (This has shades of an issue with Radio Shack scanners, back when cell phones first came out. The originals could pick up the [unencrypted] 800 MHz cell band. Units sent in for repair came back minus the upper end of their range.)