BMC Racing Competition Air Filter - FM856/04RACE
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Product Information
Full details
The BMC FM856/04RACE air filter is engineered for motorcycle enthusiasts and competitive riders who demand optimized engine performance and improved throttle response. By replacing a standard air filter with this high-flow racing version, you gain superior intake efficiency and better engine breathing, though it is important to note that this is a specialized competition part that may require professional tuning to maximize its benefits on street-legal machines.
All features
| Model Part Number | FM856/04RACE |
|---|---|
| Brand | BMC |
Extended Product Information
FAQs
Is the BMC FM856/04RACE a lifetime filter?
Yes, with proper cleaning and oiling, this filter is designed to be reusable for the life of the motorcycle.
Does this filter need to be oiled?
Yes, it is a cotton-gauze filter that must be lightly coated with specific air filter oil to capture fine dust particles effectively.
Can I use this on a stock motorcycle?
It will fit, but for best results and engine safety, you should check if your specific model requires fuel injection mapping changes.
How often should I clean the filter?
Cleaning intervals depend on the environment, but typically inspect every 3,000 to 5,000 miles or more frequently in dusty, track-day conditions.
Will this filter void my motorcycle warranty?
Modifications can impact warranties; check with your specific manufacturer policy before installation.
Troubleshooting
Engine running lean after installation
High-flow filters allow more air, which may require a fuel controller or ECU flash to adjust the air-fuel ratio.
Filter does not seat properly in the airbox
Verify the airbox is clean of debris and ensure the filter orientation matches the airbox inlet flow direction.
Pros and Cons
Pros
- Significantly higher airflow compared to factory filters
- Noticeable improvement in throttle response and acceleration
- High-quality materials designed for longevity
- Precise fitment for easy installation
Cons
- May require engine remapping or ECU adjustments
- Specifically designed for racing environments
- Requires periodic cleaning and oiling instead of simple replacement
Setup, Compatibility & Care
To install, remove your airbox cover, take out the factory filter, and insert the BMC FM856/04RACE ensuring the rubber perimeter sits flush against the housing grooves. It is critical to ensure no gaps exist around the edges to prevent unfiltered air from entering the engine. For maintenance, do not throw this filter away when dirty. Use a dedicated BMC air filter cleaning kit to wash the gauze and re-oil it properly. Always allow the filter to air dry completely before re-oiling and re-installation to ensure the filtration medium performs as intended.