Until now, the emissions scandal revealed one year ago involving first Volkswagen and then countless other companies using "defeat devices" to evade emissions requirements, was contained to the car space. That changed moments ago when the U.S. government alleged in a lawsuit that Harley-Davidson “Screamin’ Eagle” after-market engine tuners are emissions-control defeat devices, and accused the motorcycle maker of violating federal air pollution laws.

U.S. ACCUSES HARLEY-DAVIDSON OF SELLING MOTORCYCLES WITH "DEFEAT DEVICES" DESIGNED TO EVADE EMISSIONS REQUIREMENTS

U.S. FILES CLEAN AIR ACT LAWSUIT AGAINST HARLEY-DAVIDSON INC HOG.N -- COURT FILING

LAWSUIT FILED IN FEDERAL COURT IN WASHINGTON, D.C.

U.S. ACCUSES HARLEY-DAVIDSON OF VIOLATING CLEAN AIR ACT AND ON-HIGHWAY MOTORCYCLE REGULATIONS

U.S. ACCUSES HARLEY-DAVIDSON OF SELLING MOTORCYCLES WITH "DEFEAT DEVICES" DESIGNED TO EVADE EMISSIONS REQUIREMENTS

The Milwaukee-based company sold more than 339,000 of those devices from 2008 to 2015, according to a complaint filed Thursday at a U.S. court in Washington. The government seeks a court order barring the company from making, selling or installing the tuners on bikes certified as emissions compliant, plus financial penalties.

The stock is tumbling.