Air Filter Cleaning & Replacement Guide for 1981 Suzuki RM80
Shop parts for a 1981 Suzuki RM80 Dirt Bike.
The 1981 Suzuki RM80 stands out as a classic youth motocross machine with a reputation for light handling, responsive power, and easy maintenance. To keep this vintage racer at its best, a clean and properly maintained air filter is essential, ensuring the engine receives the airflow it needs while capturing damaging dirt and debris. Below is MotoSport.com's proprietary guide for cleaning and replacing your RM80's air filter–tailored specifically for 1981 models.
Why Cleaning or Replacing Your Air Filter Matters
The air filter protects your RM80's two-stroke engine by stopping dust, sand, and debris from entering the intake. A dirty filter restricts airflow and can lead to loss of power, increased fuel consumption, or even catastrophic engine damage. Given the RM80's small displacement and high-revving nature, filter condition is critical for performance and longevity.
What Makes the 1981 RM80's Air Filter Unique?
The 1981 RM80 uses a foam-type air filter, designed for repeated cleaning and oiling. Modern dual-stage elements from brands like Twin Air feature two layers: a coarse outer foam to trap larger debris and a fine inner layer for maximum filtration. Look for filters specifically intended for the 1980–1981 RM80 to ensure proper fitment and sealing.
Tools & Supplies Needed
- Replacement air filter (OEM or aftermarket compatible with 1981 RM80)
- Foam air filter cleaner or mild dish soap
- Clean water
- Approved foam filter oil
- Rags or paper towels
- Rubber gloves (recommended)
- Philips screwdriver or 8mm socket (for filter access cover)
Air Filter Removal Procedure
- Remove the seat by loosening the mounting bolts located at the rear, then slide it backwards and off.
- Locate the airbox under the seat; remove its cover by loosening any screws or clips.
- Gently lift out the air filter and its cage from the airbox—take care not to let dirt or debris fall into the intake.
Cleaning the Filter
- Tap the filter gently to remove loose dirt.
- Wash the foam element in a bucket of warm water and foam filter cleaner (or use mild dish soap). Submerge and gently squeeze–never twist or wring it out, as this can damage the foam.
- Rinse thoroughly with clean water until all soap and debris is gone.
- Allow the filter to dry completely before oiling. Do not use compressed air or excessive heat, as this could tear or deform the foam.
Oiling and Reinstallation
- Once dry, pour approved foam air filter oil onto the filter; work it in evenly by hand. Every part of the foam must be saturated but not dripping.
- Reinstall the filter on its cage, ensuring proper orientation and fitment.
- Place a thin layer of waterproof grease along the filter sealing edge for maximum dust protection.
- Reinsert the filter and cage into the airbox, ensuring a snug, even seal around the intake flange.
- Reattach the airbox cover and seat in reverse order.
When to Replace the Air Filter
- If the foam becomes torn, brittle, or does not return to shape after washing, replacement is necessary
- Replace rather than clean if heavy staining, fuel contamination, or persistent odors are present
MotoSport Tips for the 1981 RM80 Air Filter
- Always use foam-specific air filter oil–other types will not provide proper dust-blocking and may degrade the foam.
- If available, use new style dual-layer filters for added protection and longer service intervals
- Inspect the airbox and intake boot for signs of dirt migration or gaps before each ride
- The 1981 RM80 airbox design makes it easy to forget a proper seal–always check around the rim after installation
Following this MotoSport.com maintenance guide will protect your 1981 Suzuki RM80's engine and keep you riding for years to come.
Related Shopping Categories
Shop Air Filters for a 1981 Suzuki RM80 Dirt Bike.
Shop Air Filter Oil for a 1981 Suzuki RM80 Dirt Bike.
Shop Air Box Covers for a 1981 Suzuki RM80 Dirt Bike.
Shop Tools for a 1981 Suzuki RM80 Dirt Bike.
Shop Intake Parts for a 1981 Suzuki RM80 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.
