Six figures?

For motorcycles, the efficiency just isn't there yet. The weight and range of batteries matters much more in a motorcycle form factor.

Because ICE engines are a robust platform that have pretty much been figured out with an infrastructure to match just about anywhere in the world?

Don't get me wrong, I think batteries/fuel cells are the future, but in some places, ICE is still the only viable option for some while things catch up.

Also a lot of electric motorcycles are stupid expensive for what they are (granted, in this case we're already talking about a company that makes expensive rides, but overall, the high costs hurt adoption).

Basically the same reason people still like steam trains...

Motorbikes are used for long leisurely drives and the charging network isnt always on the same routes that make for fun biking. Charging would likely be frequent too given the mileage trips clock up.