Air Filter Cleaning – Replacement Guide for 1996 Cobra CM50

Shop parts for a 1996 Cobra CM50 Dirt Bike.

The 1996 Cobra CM50 is a distinctive mini motocross bike, built for serious young racers. Ensuring that its dual stage foam air filter is properly maintained is crucial for performance and longevity. Follow this MotoSport proprietary guide for step-by-step air filter cleaning – replacement tailored specifically for your Cobra CM50.

Why Air Filter Maintenance Matters

  • Engine protection: A clean air filter keeps dirt and debris from entering the carburetor and engine, preventing wear.
  • Consistent performance: Clogged filters reduce airflow, decreasing power and throttle response.
  • Longevity: Routine cleaning and timely replacement extend both engine and filter life.

Cobra CM50 Air Filter Details

  • Type: OEM-style foam, dual-stage filter for excellent dust and debris trapping.
  • Replacement interval: Clean after every ride in dusty or muddy conditions. Replace if the filter is damaged or no longer cleans up properly.

What You’ll Need

  • Foam air filter cleaner (or hot soapy water)
  • Foam air filter oil
  • Grease
  • Gloves
  • Basic hand tools
  • Clean rags

Step-by-Step Air Filter Removal

  1. Remove the seat of your CM50 by releasing the mounting fastener. Access the airbox under the seat area.
  2. Squeeze the two tabs together on the wire retainer to lift it up and out of the airbox.
  3. Pull the filter out of the airbox. Inspect the sealing surface and remove any old grease or debris from the seal area.
  4. Carefully clean any dirt between the filter location and carburetor. Take extra care here, as the compact airbox design can trap dust in hard-to-see spots.

How to Clean Your Air Filter

  1. Do not use gasoline or other highly volatile solvents. Diesel fuel, kerosene, or hot soapy water work safely for foam filters.
  2. Submerge and gently squeeze the filter in hot soapy water or approved filter cleaner to remove all dirt.
  3. Rinse the filter thoroughly and allow it to dry completely before proceeding.
  4. Saturate the dry filter with foam air filter oil. Ensure coverage across both layers. Remove excess by gently squeezing, not wringing, to avoid damage.
  5. Lightly coat the filter's black sealing surface with grease to promote a dust, dirt, and water-tight seal at the airbox.

Reinstallation

  1. Carefully refit the oiled & greased filter into the airbox, ensuring a snug fit around the sealing area.
  2. Reinstall the wire retainer: squeeze the two finger tabs together to slide into place, then push down until it bottoms out. Verify the bottom tabs pass through their respective holes and the top retainer arms lock into the side holes.
  3. Reinstall the seat and check for secure fitment.

When to Replace the Filter

  • If any tears, holes, thinning foam, or failed seams are found
  • If the filter no longer cleans up (dirt won't wash out or foam breaks down)
  • After several intense uses, even if no damage is visible, consider replacement to ensure top-level filtration.

Cobra CM50-Specific Notes

  • The 1996 CM50 uses a dual-stage, flame-laminated foam filter. This design maximizes airflow while trapping the finest dust–critical for racing minis.
  • Proper oiling is especially important for this model. Inconsistent filter oil application on the CM50 can affect carburetor jetting and disrupt performance.
  • Always use the OEM-spec or direct replacement filter to preserve proper fit and filtration characteristics unique to the CM50.

Expert Tip

If riding in especially muddy or silty terrain, carry a pre-oiled spare filter for rapid swaps between motos.

Related Shopping Categories

Shop Air Filters for a 1996 Cobra CM50 Dirt Bike.

Shop Air Filter Oil for a 1996 Cobra CM50 Dirt Bike.

Shop Air Box Covers for a 1996 Cobra CM50 Dirt Bike.

Shop Tools for a 1996 Cobra CM50 Dirt Bike.

Shop Intake Parts for a 1996 Cobra CM50 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.