The Diesel fuel powered motor cycles are expensive, any hope of prices coming down?

They get 120 to 132 miles per gallon on diesel fuel and if I can produce my own bio-diesel from algae I would almost be riding for free. http://www.dieselbike.net/commercialproduction/commercialproduction.htm http://www.olive-drab.com/idphoto/id_photos_m1030_m1d.php It wouldn’t have to be some big cruiser. I would just need a 450cc to 850cc size bike for around town, probably a dual sport [...]