Air Filter Cleaning & Replacement Guide for 2020 Honda CRF450RWE
Shop parts for a 2020 Honda CRF450RWE Dirt Bike.
The 2020 Honda CRF450RWE stands at the top of Honda’s motocross offerings, with its premium, high-output engine and unique components compared to the standard CRF450R. Keeping your dirt bike’s air intake system clean and functional is essential for maximizing both performance and longevity. The CRF450RWE uses a foam dual-stage air filter engineered to protect your high-performance engine from dirt, dust, and debris in harsh off-road conditions.
What Makes the 2020 CRF450RWE Air Filter Unique?
- Specifically designed for the WORKS EDITION (WE) model, ensuring precise fitment and optimal sealing.
- Uses a dual-layer open-pore foam construction to catch both large debris and microscopic dust, preserving intake airflow.
- Mounted using a filter cage to maintain shape and consistent performance.
When to Clean or Replace Your Air Filter
- Clean after every ride in extreme dust, sand, or mud.
- For typical track or trail use, inspect every 2-3 rides; clean or replace as needed.
- Replace the air filter when its foam, seal, or glue seams show wear, cracking, or excessive staining from oil and grime.
Required Supplies
- OEM or high-quality foam air filter for 2020 CRF450RWE
- Filter-specific cleaning solvent (no gasoline or harsh chemicals)
- Foam filter oil (not paper filter oils)
- Latex/nitrile gloves
- Clean lint-free towels or rags
- Air filter grease (optional, for sealing)
Proprietary MotoSport Air Filter Cleaning & Replacement Steps
-
Remove the Seat
Unclip and lift the seat to access the airbox beneath. -
Extract the Air Filter
Unscrew or unclip the filter cage mount and carefully pull the filter and cage out as a unit to avoid dirt falling into the intake tract. Inspect for dirt that may have entered the airbox and clean if necessary. -
Pre-Clean Surface Dust
Gently tap or brush off any loose debris away from the intake opening. -
Remove Filter from Cage
Carefully separate the filter from the support cage. -
Wash the Filter
Submerge the filter in a specialized foam filter cleaner. Work the solvent thoroughly through all foam layers.
Do not twist or wringgently squeeze only to avoid damaging the glued seams. -
Rinse and Dry
Rinse repeatedly with clean water until all soap and debris are removed. Gently squeeze out excess water, then let the filter air dry fully (no compressed air, high heat, or direct sunlight). -
Inspect the Filter
Check for tears, degraded foam, or separation at glued seams. Replace if necessary. -
Re-Oil the Filter
Generously apply foam filter oil throughout both layers. Work oil in until filter is evenly colored. Oil must cover every surface but avoid oversaturating. -
Reinstall on Cage and Seal
Slip filter back over the cage. Optional: add a thin layer of filter grease on the mating lip for an airtight seal. -
Reinstall Filter & Seat
Carefully place the filter and cage into the airbox, ensuring perfect alignment for proper sealing. Reinstall hardware and the seat.
2020 CRF450RWE Owner Tips
- Frequent maintenance minimizes the risk of costly engine damage, especially given the CRF450RWE’s race-spec, high-compression motor.
- Stick to OEM or premium dual-stage foam filters built for your model’s airflow demands.
- The WE’s enhanced engine can amplify the consequences of poor air filtration, so never delay cleaning or replacement.
- Always ensure the cage is correctly installed as uneven pressure can break the air seal.
Regularly cleaning and replacing your CRF450RWE air filter is the best way to maintain peak performance, improve throttle response, and extend engine life. Trust MotoSport for parts, expertise, and everything you need to keep your 2020 Honda CRF450RWE running at its best.
Related Shopping Categories
Shop Air Filters for a 2020 Honda CRF450RWE Dirt Bike.
Shop Air Filter Oil for a 2020 Honda CRF450RWE Dirt Bike.
Shop Air Box Covers for a 2020 Honda CRF450RWE Dirt Bike.
Shop Tools for a 2020 Honda CRF450RWE Dirt Bike.
Shop Intake Parts for a 2020 Honda CRF450RWE Dirt Bike.
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.
