Kerr firstly competed in the Motostar championship for three years, backed by family and a few personal sponsors, the highlight being a fine fourth place in the 2017 series with five podiums.
 
In 2018 Richard progressed to the British Supersport Championship aboard a Campbell Motorsport Triumph scoring a best result of sixth place in the final round at Brands Hatch which set him up for the following season where he posted two podium finishes at Oulton Park and Assen which culminated in fifth place overall in the championship.
 
2020 saw Richard be the only rider to finish every race in the Supersport class confirming his consistency and taking seventh overall in the title race before a move to the Pirelli Superstock Championship which he became champion in 2023.