The game has three difficulty modes: Arcade, Advanced, and Simulation. Arcade is basically the transition point for racing fans more familiar with car sims, as the game alters the physics to make races simple accelerate/brake affairs. You don't have to worry about falling off your bike because you're leaning too far forward and overtorqued the rear tire. If you understood the last part of that sentence, then you might want to try Advanced or Simulation mode, which amp up the difficulty and punish throttle-heavy racers with wrecks and wipeouts. As in real life, a 500cc sportsbike requires a precision touch: You need to lean into turns before you take them, apply the front and rear brakes appropriately, and remember to gradually apply the throttle as you come out of a turn.