No, motorcycles typically do not have timing belts. Instead, most motorcycles use timing chains or timing gears to synchronize the rotation of the engine's crankshaft and camshaft(s). Timing chains are commonly used in larger motorcycles, while smaller motorcycles may use timing gears or a combination of gears and chains.
Timing belts, on the other hand, are more commonly found in some cars and smaller engines. They are made of rubber and have teeth on the inner surface, which engage with gears or pulleys to maintain precise timing between the crankshaft and camshaft. While timing belts can be quieter and require less maintenance than timing chains, they are less common in motorcycles due to the higher stresses and speeds involved in their operation. Timing belts are generally not as durable as timing chains, and their failure can lead to significant engine damage.
It's worth noting that there may be some exceptions to this general rule, as motorcycle manufacturers can vary their design choices. However, the vast majority of motorcycles rely on timing chains or gears rather than timing belts.