My longtime BMW dealer was approached by Brammo in 2009 to sell their Enertia model. But when Brammo brought by a pre-production model for them to try out over a weekend, the bike failed to run, which ended that idea. (Best Buy, an investor in the company, also tried selling the Enertia next to their mountain bikes, but that plan turned out to be a failure when the DMV wouldn't give them a vehicle retail license.)
Later (sometime around 2013, I believe) Zero contacted the BMW dealership about becoming a dealer, but that deal fell through due to a concern about needing to train one of their techs to service and repair the bikes. What the dealer really wanted was for Zero to send a tech to their shop to perform any repairs and Zero was not about to agree with that plan. Personally, I suspected that the shop might also have been concerned that a tech trained in EV technology might decide to hop the BMW fence and head for nearby greener Tesla pastures.
But then Energica came along with a bike that looked more like a traditional motorcycle and (a lot more importantly) had a factory repair facility just a few miles away and offered to service and repair customer's bikes at that location. I think that cinched the deal. The shop took on the Energica franchise and became an enthusiastic dealer for the brand. Eventually the shop moved away from the repair facility (which also moved to another location), but now it appears that their in-house EV servicing concerns have been resolved.
For a relatively small stand-alone "mom and pop" motorcycle dealership, that operates on a slim profit margin, taking on something like an untested new electric motorcycle brand without a customer and dealer satisfaction track record is a risk that most small shops are not likely to embrace quickly or easily.