It seems this is Harley's current issue resolution process:
1. Deny there is a problem. Tell all customer's either their issue is normal (they all do that), or that their aftermarket modifications voided their warranty.
2. Wait for aftermarket to "prove" there is an issue and/or threat of class action lawsuit.
3. Send out letter to gather information.
4a. If issue can cause serious injury, issue a recall; or
4b. If issue does not pose significant potential safety threat, issue new spec based on information gathered so vast majority of claims fall under new established parameters.
5a. If no safety issue, wait for aftermarket to develop a real fix; or
5b. Create a Screamin' Eagle upgrade kit at customer's expense (parts + labor) to "get to the upper range" of spec.