Why are Harley Davidson Motorcycles So Loud?

TL;DR

Harley-Davidson motorcycles are known for being loud, but the noise levels exceed regulations and can cause hearing damage. There is a backlash against noisy bikes, with some communities placing restrictions and bans.

Transcript

Anyone who’s ever witnessed a poker run knows that Harley-Davidson motorcycles are really, really loud. And since not everyone thinks that’s a good thing, in recent years, there have been efforts to stifle them. Straight off the line today, Harley exhaust systems can emit noise as high as 80 decibels (dBs), give or take depending on the model. For ... Read More

Key Insights

• 🥰 Harley-Davidson motorcycles are known for their loud, powerful engines, but the noise levels exceed regulations and can be damaging to hearing.
• 😶‍🌫️ Many Harley owners choose to swap out the stock exhaust systems for straight pipes, resulting in even louder noise levels.
• 🤕 There is a backlash against noisy motorcycles, with communities implementing restrictions and bans to address noise pollution.
• 🍔 The President and COO of Harley-Davidson has urged bikers to refrain from modifying their bikes, as the noise issue is causing problems for the company.

Questions & Answers

Q: Why are Harley-Davidson motorcycles so loud?

Harley-Davidson motorcycles are loud because loud, powerful engines have become a signature of the brand. The tight space on motorcycles makes it difficult to achieve the level of quietness found in passenger cars.

Q: Are there regulations in place to control the noise from motorcycles?

Yes, there are regulations in place, such as EPA stamp enforcement, to ensure that motorcycles comply with noise regulations. However, enforcement has been lax in the past, leading to stricter mandates in some communities.

Q: Do modifications like straight pipes enhance performance?

Testing has shown that straight pipes do not necessarily outperform pipes with lower noise levels. Choosing the wrong pipes can decrease horsepower and torque.

Q: Do loud exhaust systems on motorcycles improve safety?

Some enthusiasts argue that loud pipes save lives by alerting drivers to the presence of motorcycles. However, statistical data suggests that the majority of fatal crashes involving motorcycles are caused by the motorcyclist themselves.

Summary & Key Takeaways

• Harley-Davidson motorcycles emit noise as high as 80 decibels, which is louder than a car and exceeds many cities' noise ordinances.

• Some Harley owners swap out the exhaust systems for straight pipes, resulting in even louder noise levels that can exceed 100 decibels.

• The noise pollution from motorcycles has led to various restrictions and bans in communities, causing a backlash within the Harley-Davidson community.