With sales well below expectations and 80 units reportedly unsold, Austrian motorcycle company KTM has temporarily halted production of the ultralight X-Bow two-seat sports car.

KTM officials originally expected sales of 1,000 units a year. But that lofty goal is being scaled back to between 200 and 300 units a year. So far, 500 copies of the X-Bow have been built.

Reports in Europe say that X-Bow production in Graz, Austria, has been halted until January.

The X-Bow was a featured car during the 2008 Race of Champions event in London and is slated to be used again this year, according to the event's Web site.

The X-Bow is powered by an Audi four-cylinder engine rated at 240 hp, mated to either a dual-clutch transmission or six-speed manual. The car is not certified for sale in the United States.