Revving up a motorcycle, including a Harley Davidson, at a stoplight is generally possible. However, it's important to note that revving the engine excessively or unnecessarily can be considered disruptive and potentially illegal in some jurisdictions. It's essential to abide by local laws and regulations regarding noise levels and public disturbances.
Revving a motorcycle engine while at a stoplight is sometimes done for various reasons, such as clearing out carbon buildup or simply displaying the power and sound of the motorcycle. However, it's important to use discretion and be considerate of others around you. Excessive or unnecessary revving can be perceived as noise pollution and may disturb pedestrians or other motorists.
Always exercise good judgment and be aware of local regulations and etiquette when it comes to revving the engine of your motorcycle at a stoplight or in any public setting.