Pros and Cons of Aftermarket Motorcycle Exhaust
Considering upgrading your bike’s exhaust system? You’re not alone. Many riders face the dilemma of whether they should switch to an aftermarket one or not.
I’ve been down this road myself, weighing up whether the investment in an aftermarket exhaust was worth it for my ride. Let’s cut through the noise and get straight to what matters about aftermarket motorcycle exhausts.
Table of Contents
What Exactly is an Aftermarket Exhaust?
Simply put, it’s any exhaust system that isn’t the original one fitted by the manufacturer.
Aftermarket exhausts come in various styles:
- Slip-on exhausts – Replace just the muffler section
- Full systems – Replace the entire exhaust from headers to muffler
- Headers only – Replace just the front pipes
The Real Benefits of Aftermarket Exhausts
Let’s be honest, aftermarket exhausts are fun. The heavy sounds, better aesthetics, popping effects, and performance enhancement all together make an aftermarket exhaust worth it.
Performance Gains
One of the main reasons riders upgrade their exhaust is for better performance. With the right aftermarket system, you can expect:
- Increased horsepower – Typically 2-5% gains without other modifications
- Better torque – Especially in the mid-range where most street riding happens
- Improved throttle response – More immediate power delivery when you twist the grip
When I upgraded my CBR650R’s exhaust, the difference in mid-range pull was noticeable immediately.
Weight Reduction
Stock exhausts are often bulky and heavy. Switching to an aftermarket option can:
- Reduce overall weight by 5-15 pounds
- Improve handling through better mass centralization
- Make the bike feel more nimble in corners
The Sound Factor
Let’s be honest – many of us want that deeper, richer exhaust note along with that pooping effect while decelerating the motorcycle.
A quality aftermarket exhaust can:
- Give your bike a distinctive sound signature
- Provide that satisfying rumble or howl depending on your preference
- Make your presence known to distracted drivers (safety benefit)
Aesthetic Improvement
The visual upgrade is significant. In the majority of cases, motorcycle manufacturers design the worst possible-looking stock exhaust systems. This is also the reason why many riders opt for an aftermarket exhaust.
- Sleeker designs that complement your bike’s lines
- Various finish options (carbon fiber, titanium, stainless steel)
- Custom options to make your bike stand out
The Downsides You Need to Consider
Well, a saying goes, “If you want something, you have gotta give something”. There are multiple downsides to switching to an aftermarket exhaust. Lets look at some,
Cost Considerations
Even though there are many cheaper exhausts available in the market. But, as always quality comes at a price:
- Slip-ons typically range from £150-500
- Full systems can cost between £500-1,500+
- Premium brands like Akrapovič or Yoshimura command top prices
Noise and Legal Issues
This is a big one that many enthusiasts overlook:
- Many aftermarket exhausts exceed legal noise limits
- You could face fines or fail vehicle inspections
- Some track days and riding areas have noise restrictions
I learned this lesson the hard way after being turned away from a track day for exceeding the 95dB limit.
Warranty Concerns
Before making the switch, consider:
- Installing an aftermarket exhaust may void parts of your manufacturer’s warranty
- Dealers can sometimes detect if ECU settings have been modified
- Engine damage blamed on exhaust modifications might not be covered
Fuel Management Requirements
Keep in mind that motorcycle manufacturers conduct extensive research to develop optimal exhaust systems that maximize fuel economy. As a result, if you switch to an aftermarket one your motorcycle will consume more fuel. Additionally, most bikes need tuning after an exhaust change:
- Fuel mapping often needs adjustment to prevent running lean
- Additional costs for power commanders or ECU flashing
- Without proper tuning, you might experience poor running conditions or even engine damage
Types of Aftermarket Exhausts
Slip-On Exhausts
Slip-on exhausts are the most commonly used because of their lower cost and easy installation. If you ask me personally, a slip-on exhaust is the better option for beginners.
Pros:
- Easier installation (often DIY-friendly)
- Lower cost entry point
- Modest performance gains
- Weight reduction
Cons:
- Limited performance benefits compared to full systems
- May still require fuel management adjustments
Full Systems
If you have a larger budget and seek the best possible performance, full systems exhausts might be a better option for you.
Pros:
- Maximum performance potential
- Greatest weight savings
- Complete visual transformation
- Best sound options
Cons:
- Highest cost option
- More complex installation
- Definitely requires fuel management adjustments
- More likely to have legal compliance issues
Top Exhaust Brands to Consider
If you’re looking for quality options, check out our detailed guide on top exhaust brands for motorcycles.
The market leaders typically include:
- Akrapovič
- Yoshimura
- SC-Project
- Arrow
- Leo Vince
Each has their own signature style and sound characteristics.
Installation Considerations
Before purchasing, think about:
- DIY vs Professional – Some systems are straightforward, others require special tools
- Additional parts needed – Gaskets, O2 sensor extensions, etc.
- Tuning requirements – Budget for dyno time or a power commander
For more on installation specifics, see our guide on motorcycle exhaust types and installation.
Heat Management
Aftermarket exhausts can run hotter than stock systems.
Consider:
- Heat shields if the exhaust routes near your leg
- How exhaust heat wrap works to manage temperatures
- Potential for exhaust discoloration over time
Maintenance Requirements
Aftermarket systems may need:
- More frequent checking of mounting hardware
- Special cleaning products for titanium or carbon fibre
- Different care than chrome stock systems
FAQ About Aftermarket Motorcycle Exhausts
Will an aftermarket exhaust damage my engine?
Do I always need to re-jet or remap after installing an aftermarket exhaust?
Are there legal aftermarket exhausts available?
How much horsepower will I gain with an aftermarket exhaust?
Can I use my stock O2 sensors with an aftermarket exhaust?
Making The Right Choice
When considering if an aftermarket exhaust is right for you, ask yourself:
- What’s my primary goal? (Sound, looks, performance)
- What’s my budget, including installation and tuning?
- Am I comfortable with potential legal issues?
- How will this affect my bike’s reliability and maintenance?
For inspiration on modifications, check out our guide on R15 V3 modifications which includes exhaust options.
Conclusion
The pros and cons of aftermarket motorcycle exhaust systems ultimately come down to your priorities as a rider. The performance gains, weight reduction, improved sound, and enhanced aesthetics are compelling benefits. However, the costs, potential legal issues, warranty concerns, and additional tuning requirements shouldn’t be overlooked.
Make an informed decision based on your riding style, budget, and local regulations, and you’ll be set to enjoy all the benefits of a quality aftermarket exhaust.
