This seems like an odd thing to do for someone without a physical handicap
( not enough hand strength to operate the front brakes) but whatever makes him happy. It must make it interesting for him when he rides another moto.
As others have posted, it was interesting in the bad old days before moto control positions and shift patterns were standardized to ride motos with the foot controls on different sides. I used to own a Suzuki X6 Hustler and a Benelli 125 with foot control position different on each. You had to focus on remembering which moto you were riding
