All warranties on electrical components must be taken up with the individual manufacturer.
The returned product must be in the original packaging, unopened and unaltered.
Compare this with, say, a Honda CBR1000RR, which has a stroke of only about 2.25 inches. Now, remember the poor lubricants and substandard metals of a century ago?
Packaging should be the same as what is found in a retail store, unless the item was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag.
Sportster models are designated in Harley-Davidson's product code by beginning with "XL".