How fast can you go on a 15cc motor?

The speed of a 15cc motor can vary based on several factors, including the type of vehicle, weight, and design. Generally, small engines like a 15cc model can achieve speeds ranging from 20 to 30 mph (32 to 48 km/h) in lightweight applications, such as RC cars or small scooters. However, performance may differ significantly depending on the specific setup and conditions.