This is the motor that will rule the motor assist market about the time that micro diesels do.
http://www.weberprecision.com/
Enjoy your fantasy boys. Market demands for diesel for this type of application are a fraction of fraction of a percentage and looking to stay that way, mainly because it is easier to get people to just go the path of least resistance. And at this time the cheap chinese 2 strokes rule that roost. In the meantime there are plenty that are not just talking about viable motor assist, they are doing it with products that are available today in the real world with impressive results of range and fuel economy. Last years Shell Eco-Challenge was won with an ICE that got 2800mpg.
Carry on.