2015 ATK GV250

ATK released the 406, the two-stroke air-cooled Rotax-powered model that would become synonymous with their two-stroke line. The two-stroke line was also the first to receive a second bike, a 250 cc (15 cu in) counterpart.

Leitner sold ATK to an investment company, who would move the corporation to Utah. The new owners would expand the product line-up greatly, offering a second four-stroke, the 350, as well as electric-start and lightened variations of most models.

With the purchase of Cannondale Motorsports, ATK began to assimilate the acquired models into their line-up. Thus began a new era for the company, as it began to badge-engineer its products. ATK continued to offer variations of the 50MX, as well as a two-stroke 125, the 250 and 260 Enduros, the four-stroke 605 and 500 Enduro, and a 600 Police Edition. The biggest news, however, was the release of the ATK 700, marketed as the Intimidator.

. In January 2003, Cannondale Motorsports filed bankruptcy and ATK Motorcycles acquired all remaining inventory.