Recently in HDT diesel Category

Cycle World via the International Motorcycle World website lists nine frugal fuel sipping motorcycles. I was at one of their shows in Washington D.C. last year. Great way to see almost every model available in one stop.

1. Honda CRF230L - 93 MPG
2. Honda Nighthawk - 90 MPG
3. Yamaha XT250 - 80 MPG
4. Aprilia SportCity 250 - 75 MPG
5. Kawasaki Ninja 250R - 60 MPG
6. Yamaha WR250X - 60 MPG
7. Suzuki GSX650F - 56 MPG
8. Harley-Davidson Sportster 883 - 55 MPG
9. Suzuki SV650 - 55 MPG

Interesting to note that a home grown Harley with an 883 cc engine gets the same mileage as many bikes with smaller displacement. And they forgot the Harley's Buell Blast with a 500 cc single cylinder that gets 64/73 mpg according to the Buell website. The bike falls into the same price bracket as others on the list.

I would love to see Harley market into the economy euro/japanese high fuel economy rider market. The market is ripe for a domestically made fuel squeezer.

Build it here and squeeze foreign oil. The concept makes me giddy.

Hayes Diversified Technologies, Hesperia, CA has a 667cc diesel motorcycle that gets 105 mpg. Production is delayed due to production requirements of the military.

I ride a BMW 800 ST which gets 67mpg. Hardly a frugal ride for this cheap soul, but it was the highest fuel mileage bike I could find with an engine that suited me that I wouldn't mind riding on an Interstate at 70 mph for 6 hours (and could get out of it's own way at that speed).
67 mpg motorcycle grocery getter camper (greenmesh.com 5/08)

Unlike the evolution of the Humvee to Hummer, the civilian diesel motorcycle products from HDT will offer the consumer with a way to squeeze fuel.

The U.S. military wanted to streamline their fuel needs. Instead of multiple fuels for different vehicles they wanted to economize the distribution process with one fuel.

The problem is that a diesel Humvee and a motorcycle had to run on the same fuel and no domestic manufacturer wanted to produce a diesel motorcycle. A group of small manufactures bid on the project and Hayes Diversified Technologies of Hesperia, CA won.

The 4-Stroke, IDI, single cylinder, liquid cooled diesel motorcycle is rated at 96 mpg. Two models have been slated for civilian production but military demand has been so great that the civilian models have been postponed.

The civilian D650A1 Bulldog has a projected dry weight of less than 400 pounds and the motorcycle is expected to have more than 600 miles of range on a tank of diesel, achieving in excess of 100 mpg.

Biofuel Diesel Motorcycle Wins At Bonneville Speed Trials (11/01/07)

Unlike any other machine at Bonneville, HDT's diesel bike is capable of fording a 24-in. stream, and climbing or descending a 60 percent grade while operating on any version of diesel, kerosene or jet fuel. The HDT diesel bikes operated on B20 biodiesel (20 percent soybean, vegetable oil and other agricultural components; 80 percent petroleum diesel).

Ironically, consumers will have to wait for military action to wind down in the Middle East before that can conserve oil with a 100 mpg motorcycle.