Business owners in Queens are suing the city and the NYPD for $300 million saying they’ve been strong-armed and harassed into not cooperating with an NYPD investigation into a sweeping karaoke-bar bribery scandal. Owners of Flushing bars 360 Lounge, Forbidden City and Home Run KTV accuse NYPD Commissioner Bill Bratton of ordering the crackdown in the Asian community to “intimidate” witnesses during a two-year probe of more than 20 officers from the 109 precinct, the Brooklyn federal court complaint says. In December, NYPD Lt. Robert Sung and Detective Yatyu Yam were arrested for allegedly taking bribes from karaoke bar owners in exchange for tip-offs to impending raids and intervening in customer arrests. The suit claims Bratton’s edict stemmed from being “unhappy about the karaoke bar protection scandal impact upon his legacy” — so he met with Internal Affairs Bureau Deputy Commissioner Joseph Reznick, Assistant Chief of Queens North Diana Pizzuti and former 109 Precinct Commanding Officer Thomas Conforti and told them to “handle” it. Since late 2014, the club owners say they’ve been subjected to unlawful “business inspections” and a beefed-up presence of cops at their establishments, while their customers have been wrongfully stopped and frisked and even arrested for no reason, the complaint says.