Hayes Diesel Technologies, USA, stands firm on a core value system that embraces Innovation, Quality and Service. Hayes delivers uncompromising technology, dynamic engineering and revolutionary design to its customers in every product. The company's size, expertise and intensity allow for greater flexibility developing leading edge technology for the motorcycle and small diesel engine markets.

We are honored to serve the men and women of our Armed Forces by providing the best equipment possible. Hayes is proud to provide the best in diesel motorcycle technology to both our government and civilian customers.

Note: Hayes Diesel is now strictly a Research and Development Firm.  Our purpose is to further the development of our proprietary diesel technology through independent Research and Develop and to work with interested Universities and manufacturers to advance clean diesel technology for a wide variety of commercial and automotive uses. 

Hayes Diesel does not offer engines or diesel powered vehicles for consumer use.

Racing for the Right Reason
May 13, 2011
Fred Hayes and his Wonderful Diesel Motorcycle, Winner of the Vetter Challenge on the Quail Ride.

The 2012 Vetter Challenge at the Quail Gathering is History
Your winner (again) Fred Hayes on his Diesel: 109.6 mpg! The Quail Gathering showcases the finest motorcycles from the past, present and future.

Chapter 50:
Las Vegas to Barstow
Nov. 20, 2011
The results are in for the Las Vegas to Barstow Challenge test ride Earlier this year

Five of the new Challengers met at the AMA Hall of Fame Inductions in Las Vegas to check out the possibilities. First, we displayed our machines Saturday at the David Mungenast Memorial Concours...