[Alex] has been working on a diesel motorcycle project for a few months now, and the project is finally bearing fruit. It’s quite an accomplishment for something [Alex] describes as an ...

larger and more expensive diesel motorcycle. Still, the Hayesmobile is Marine tough and gets a tested 96 mpg. At 55mph.

While a few small boutique motorcycle manufacturers have dipped a toe or two into diesel engines for motorcycles, the established brands have barely ever offered even a hint of interest in oil ...