Small diesel engines can and do power boats ... Unlike a minibike, a motorcycle is made for legal highway driving. Furthermore, diesel powered motorcycles are exceedingly rare, but do exist.

The diesel engine had other problems initially ... You'd say that this is a significant displacement for a small motorcycle, ...

[Alex] has been working on a diesel motorcycle project for a few months ... for something [Alex] describes as an industrial Chinese engine, a modded Honda Superdream, and a few Royal Enfield ...

In a fluke of no one else competing in the alt fuel class, [John]’s biodiesel motorcycle ... The stock engine was replaced with a Chinese knock off of a Yanmar air-cooled diesel motor.