That in the present economy younger people cannot afford premium motorcycles.
That a significant number of younger people have turned against motor vehicles in general, out of conviction that existing vehicle choices are more problem than solution.
That the tastes and opinions of older riders have imprisoned H-D's product planning within a model based on traditional masculinity, on styling from "a simpler time, when life made sense," and on frank appeals to nationalism and personal freedom. Until quite recently this product strategy has been very successful.
Simple substitution. Start with a generic sportbike and replace its internal combustion engine with an electric motor and 250 pounds of batteries. It looks like an old GSX-R, but it's electric.
The picnic cooler on wheels. The "cooler" is the featureless lump of the 250-pound battery.