Bet it's a torquey little bastard. https://www.bike-urious.com/diesel-power-2005-ecorider-hippo/ and someone did this, looks cool though.https://www.bike-urious.com/diesel-powered-1972-honda-xl250/
Enfield made a few diesels back in the early '70s.
our military has used those for years ......nothing new at all!!! https://nationalmcmuseum.org/wp-content/uploads/2016/08/2004-Hayes-DT-1.jpg