godan verb (-su)
manage skillfully; handle well; ride with mastery
Used for skillfully controlling a vehicle, animal, or device that one rides, such as a horse, bicycle, car, or motorcycle. Implies confident, adept handling.
彼はどんな馬でも乗りこなす。
He can ride any horse skillfully.
新しいバイクをすぐに乗りこなせるようになった。
I quickly became able to handle the new motorcycle well.