I own 11 motorcycles from sports bikes to Goldwings, if you are truly being pursued your best defensive weapon is marbles and an oil slick.
Bikers wear helmets so flash bangs may be ineffective and the latest leathers sport carbon fiber and spectra panels, not a true ballistic material but very protective.
Fit side and rear nozzles to your vehicle and all you need is vegetable oil, the marbles will bounce and hit the riders face plates, windshields and may actually topple the bike with the combination of a slippery agent.
Anyone can argue till the cows come home but that is what I would do, but since I live where there are no biker gangs I have no need for such a contraption.
It also helps if you increase your speed and roll them out the sun roof too