Air Filter Cleaning – Replacement Guide for 2023 Suzuki RM85
Shop parts for a 2023 Suzuki RM85 Dirt Bike.
The 2023 Suzuki RM85 is a race-bred mini-motocrosser where a clean and properly oiled air filter is essential for peak performance and engine longevity. Regular air filter maintenance is even more critical for the RM85, as its high-revving two-stroke engine is especially sensitive to dust and dirt ingestion. This guide provides MotoSport's proven method for cleaning and replacing your RM85's air filter, along with model-specific tips to keep your bike race-ready.
Why Regular Air Filter Maintenance is Vital
- Protects the engine – Prevents abrasive particles from entering the cylinder and causing wear.
- Maximizes performance – Ensures proper air-fuel mixture for peak power and throttle response.
- Extends component life – Reduces risk of costly engine repairs and premature part failure.
Recommended Tools & Supplies
- 8 mm – 10 mm socket or T-handle
- Clean, lint-free towels
- Non-flammable filter cleaner solvent (recommended: foam air filter cleaner)
- Foam filter oil (high-tack air filter oil)
- Grease (for filter rim sealing)
- Nitrile gloves
Step-by-Step: How to Remove & Clean the Filter
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Remove the seat
Use your socket or T-handle to remove the seat bolts. Lift off the seat to access the airbox. -
Take out the air cleaner cap
Inside the airbox, remove the air cleaner cap and unscrew the air filter retaining bolt. Carefully withdraw the filter and backing cage.
Note: Inspect for signs of rips, tears, or excessive wear on both the filter and cage. Replace if damaged. -
Pre-clean the filter
Gently tap the filter to knock off loose debris. Brush or vacuum out the airbox, being careful not to let dirt fall into the intake tract. -
Wash the filter
Immerse the filter in a pan filled with non-flammable cleaning solvent made for foam filters. Work the dirt out by gently squeezing (never twist or wring – this causes tearing). -
Dry the filter
Squeeze out excess solvent, then allow the filter to air dry completely. Avoid using heat sources which can degrade the foam.
Oiling & Reinstalling
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Apply high-tack foam filter oil
Place the dry filter in a plastic bag, add filter oil, and knead until oil is distributed evenly through the foam. Remove the filter and squeeze (do not wring) out any excess oil. -
Grease the rim
Apply a thin layer of grease around the filter's sealing flange. This creates a dust-proof seal inside the airbox edge. -
Reinstall the filter
Mount the filter and cage assembly back into the airbox, ensuring no edges are pinched and the bolt is tightened securely (do not overtighten). Replace the airbox cap and seat.
Replacement Frequency – Special Notes for 2023 RM85 Owners
- Replace the air filter when it shows signs of tearing, hardened spots, or persistent discoloration after cleaning.
- Clean the filter after every ride in excessively dusty or muddy environments, and every 2-3 rides in normal conditions.
- RM85-specific tip: The RM85 air filter is a dual-stage foam element. Always verify both layers are intact after removal, and ensure absolute cleanliness in the airbox because this model's carburetion is highly sensitive to fine dust.
- Optional: Use filter screens or pre-filters for extra protection during mud races.
Extra Checks – Pro Motocrosser Practices
- Inspect the air filter cage and mounting bolt for stripping or damage.
- Always have a pre-oiled spare filter ready for quick swap-outs during race weekends.
- If water crossings are frequent, consider temporarily sealing the airbox edge with additional grease for extra protection.
Proper air filter maintenance is one of the most effective, low-cost ways to protect your 2023 Suzuki RM85, unleash its full potential, and ensure podium-finishing reliability ride after ride—MotoSport makes it easy to keep your bike at its best.
Related Shopping Categories
Shop Air Filters for a 2023 Suzuki RM85 Dirt Bike.
Shop Air Filter Oil for a 2023 Suzuki RM85 Dirt Bike.
Shop Air Box Covers for a 2023 Suzuki RM85 Dirt Bike.
Shop Tools for a 2023 Suzuki RM85 Dirt Bike.
Shop Intake Parts for a 2023 Suzuki RM85 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.
