The way they were talking on the PA, the Harleys were stock bikes with the exception of tires and exhaust, the latter provided by Vance and Hines, the series title sponsor.
Matt
The XR1200 series rules require a spec kit (non-stock) of bodywork, pipe, ECU ("Racing Fuelpak) and 17" front wheel all
sourced from V&H, spec tires, and allows suspension and brake mods on both ends + controls & instruments mods (footpegs, bars, etc). When you put it all together they're
significantly different from stock in terms of things that matter when you're trying to go fast on a road course.
The "they're stock" hype is part of the marketing strategy for the primary XR1200 Series stakeholders (V&H, HD and AMA Pro-road racing/Daytona Motorsports Group).
Not suggesting that the difference between street and track is nearly so great in the XR Series, but remember, NASCAR is called "stock car racing" and the AMA Pro Road racing series is owned by the same parent company as NASCAR
Having watched Danny Eslick race at many times with the CMRA, I'm 100% confident that his times on the lighter though slightly lower powered 'Series XR' would be better than his times on the C14 on any US roadcourse including long-straight Daytona