for the stock 2wd/4wd class the motor has to be a 540 'sealed can' no faster than 20t, most people use the hpi saturn 20t, tamiya sport tuned 23t/25t, traxxas stinger 20t etc are fine,
just google'd your kyosho motor and its a sealed can and 20t so it's fine
otherwise there is modified 2wd and 4wd classes which you can run any motor you wish in
