Looks like the American Motorcycle Association knows what's up.

[Erik Timmerman]

First sanctioned electric motorcycle, I mean e-bike race. I do have to give props though, if that guys HRM is even close to accurate, he is pinned.

 

[Tom K.]

IIRC, Josh Hill placed third at the 2016 Red Bull Straight Rhythm on an electric MX bike from Alta Redshift.

Then won the Lites class in 2017 on the same bike.

Sadly, Alta Redshift has closed its doors, though rumors of a second coming abound.