Here's the press release from Harley-Davidson on them missing the Dunlop test at Daytona next week:

Significant efforts being made to improve the Harley-Davidson VR 1000 Superbike racing program are underway, according to John Baker, director of racing.

Due to the intensity of those efforts, the team will decline participation in the Dunlop tire test held at Daytona International Speedway beginning December 11. "The team will be ready for the start of the AMA season at Daytona in March, but not for the upcoming Dunlop tire tests," said Baker. "When we finished the 2000 season, we had a choice to make: would we move boldly ahead with the intent of being one of the top teams in the AMA Superbike series, or would we be satisfied with the status quo? Harley-Davidson as a company has chosen to invest the resources necessary to develop the VR 1000 into a competitive race bike in the AMA Superbike series. We're in this to win."