It's interesting to note the parallel between H-D and Honda.
The Pan European (ST1300 to you Americans
) developed quite a reputation for wobbling at high speeds. Honda took the issue quite seriously, going as far as borrowing bikes from both law enforcement agencies and private owners to test them and see if they could replicate the problem. They couldn't.
But this doesn't mean the problem doesn't exist. It's probably down to a combination of road conditions, tyre types, equipment positioning etc. Very, very hard to pin down.
I don't know if H-D went through a similar procedure to pin down problems and fix them and then raised a white flag or they simply did the math and found it's cheaper to live with them.
Ford did the math about the Pinto and they found it was simply cheaper to go to court over every single case than recalling the cars.
H-D may have reasoned juries see motorcycling as inherently dangerous, so they may always blame "rider's error" or "speeding" for it and know that unless the offended part has a bulletproof case they have reasonable chances of success.
Having said that it's pretty much unbelievable H-D is still managing to sell so many bikes with such a dated design. If you rode any Japanese cruiser from the past twenty years it will feel like a starship next to an H-D. When I test-rode the VTX1800 I found asking myself "Why are people still buying H-D's when you have this available?"