Air Filter Cleaning – Replacement Guide for the 2018 Honda CRF250LRABS

Shop parts for a 2018 Honda CRF250LRABS Dirt Bike.

Maintaining optimal performance on your 2018 Honda CRF250LRABS relies heavily on routine air filter care. This lightweight dual sport is engineered for both reliability and versatility, equipped with features like ABS and a fuel-injected engine that benefit directly from clean airflow and regular filter service*.

Unique to the CRF250LRABS, Honda equips this model with a viscous type air cleaner element. Owners should know that this is not a conventional foam or paper filter. This air filter should not be cleaned with compressed air or any typical solvents as doing so may degrade filtration properties and shorten engine life. Instead, replacement is Honda's recommended maintenance action.

How Often to Replace the Air Filter

  • Inspect your air filter regularly, especially after riding in dusty or off-road conditions. Replace it as needed.
  • Under normal use, Honda suggests filter inspection at 12,800 km (approx. 8,000 miles), but more frequent replacement is smart if riding off-road or in challenging environments.

Locating & Removing the Air Filter

  • Turn off the ignition and allow the engine to cool down.
  • Remove the seat by releasing the latch. (Refer to your owner's manual for detailed seat removal instructions.)
  • Locate and remove the left side cover. This will expose the air filter box.
  • Unscrew or unlatch the airbox cover to access the air filter element.

Replacing the Air Filter

  • Carefully withdraw the old air filter, noting its orientation to ensure proper installation of the new one.
  • Do not attempt to wash or blow out the filter. The viscous coating that traps dust cannot be restored after cleaning.
  • Insert a genuine Honda replacement filter, making sure it fits properly and the airbox is sealed on reassembly.
  • Reinstall the airbox cover, side cover, and seat.

Extra Tips for the CRF250LRABS Owner

  • Neglecting filter maintenance can degrade engine performance and fuel efficiency, especially important for this fuel-injected, dual sport model.
  • If you use aftermarket performance filters (e.g., racing or reusable options), be sure they comply with the specifications for this CRF250LRABS and maintain proper filtration, as improper elements can let damaging dirt enter the engine.
  • Riding frequently in wet, dusty, or muddy areas? Increase your inspection and replacement frequency to protect your engine and keep the ABS system functioning reliably.

Conclusion

Unlike older or simpler designs, your 2018 Honda CRF250LRABS demands specific attention to its viscous air filter type and prefers outright replacement instead of old-school cleaning methods. With the right replacement intervals and a focus on correct installation, you'll maintain top performance and engine longevity, whether commuting or tackling rugged trails.

* This article is proprietary to MotoSport and tailored to Honda CRF250LRABS riders.

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Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.