MotoGP riders achieve remarkable speeds on their bikes, often exceeding 300 km/h (186 mph) during races. The exact speeds can vary depending on factors such as track conditions, bike performance, and rider skill. Straight sections of the track provide the best opportunity for riders to reach their highest speeds. On certain tracks, riders can achieve top speeds of around 350 km/h (217 mph) or even higher. It's important to note that these speeds are approximate and can vary from race to race and between riders.