Changing the air filter on your motorcycle is often touted as a simple method of increasing performance and horsepower. Although K&N and BMC are well-known brands, but do they truly deliver on their promises?
The advantages and disadvantages of aftermarket air filters will be discussed in this article, along with advice on how to spot authentic goods from fakes.
What Are Motorcycle Air Filters?
Motorcycle air filters play a crucial role in engine performance by filtering out dust and debris from the air before it mixes with fuel. There are three main types of air filters:
- Paper Air Filters: Factory-fitted in most motorcycles, these are designed for single use and cannot be cleaned or reused. They’re budget-friendly but require frequent replacements.
- Cotton Air Filters: Found in high-performance filters like K&N and BMC, these filters are washable and reusable. They allow better airflow compared to paper filters, potentially enhancing performance.
- Foam Air Filters: Commonly used in older motorcycles or off-road bikes due to their durability in dusty conditions.
How Air Filters Impact Performance
An air filter’s primary function is to ensure clean air reaches the engine. A clogged or dirty filter can reduce airflow, forcing the engine to work harder and resulting in reduced performance.
High-performance air filters, like those from BMC or K&N, are designed to improve airflow, allowing the engine to breathe more efficiently. This can lead to:
- Improved Horsepower: Better airflow means the engine can combust fuel more efficiently, potentially increasing power output.
- Enhanced Fuel Economy: When air intake is optimized, the engine uses fuel more effectively, potentially improving mileage.
- Reduced Engine Wear: Clean air minimizes the risk of dust and debris entering the combustion chamber, prolonging engine life.
Advantages of Aftermarket Air Filters
- Reusability: Cotton air filters can be washed and reused multiple times, making them more cost-effective in the long run.
- Durability: High-quality filters are built to last and often come with warranties, such as K&N’s “Million-Mile Warranty.”
- Performance Boost: Enhanced airflow can lead to noticeable improvements in power and throttle response.
Disadvantages of Aftermarket Air Filters
- Higher Initial Cost: Compared to paper filters, high-performance options are more expensive.
- Maintenance Requirements: Reusable filters require regular cleaning and oiling, which can be time-consuming.
- Compatibility Issues: Installing an aftermarket filter may require adjustments to the air-fuel mixture or engine tuning to avoid performance problems.
Tips to Identify Genuine Air Filters
Counterfeit air filters can harm your engine and fail to deliver promised benefits. Here’s how to spot a genuine product:
- Weight: Original air filters, especially from brands like K&N or BMC, are heavier due to their high-quality materials.
- Build Quality: Genuine filters have smooth finishes and precise construction.
- Markings: Look for clear labels such as “Made in USA” or brand logos.
- Warranty: Most reputable brands offer warranties, which counterfeit products lack.
Final Thoughts
While aftermarket air filters like K&N and BMC can enhance your motorcycle’s performance, they come with specific maintenance requirements and higher upfront costs.
For riders seeking better horsepower, improved fuel economy, and long-term savings, these filters are worth considering.
However, ensure you purchase from a trusted source to avoid counterfeits and always tune your engine after installation to maximize benefits.
Would you upgrade your motorcycle with a high-performance air filter? Share your thoughts and experiences in the comments!