You can use front and rear brakes. The rear brakes are optimized when steering your bike during drift, but it will increase your braking distance. The front brakes is like full/complete brakes. When racing on tracks which require limited braking distances the adjustment of this brake is imperative. Leaning backwards will cause the bike to under steer and send it into the corner, but leaning forward will cause the bike to lose speed when exiting corners, but your turn-ins will get better.