Air Filter Cleaning – Replacement Guide for 2018 Sherco 125SE-R
Shop parts for a 2018 Sherco 125SE-R Dirt Bike.
Keeping your 2018 Sherco 125SE-R running at peak performance demands regular attention to your air filter. A clean, well-oiled filter preserves engine power, extends engine life, and maintains the crisp throttle response Sherco two-strokes are known for. Use this MotoSport.com exclusive guide to maximize the reliability of your ride on the trail or track.
Why Air Filter Maintenance Matters on the 2018 Sherco 125SE-R
Your Sherco's 125cc two-stroke engine needs clean air for quick throttle, crisp power delivery, and minimized wear. The 2018 model's design, featuring a lightweight chassis and adjustable suspension, is ideal for aggressive off-road pursuits – settings where dust and debris can clog your filter quickly if ignored.
Most 2018 Sherco 125SE-R models use a dual-stage, open-pore foam filter for optimal flow and debris trapping. Performance foam filters, like the Twin Air or Tusk, provide excellent protection while ensuring high airflow crucial for your small-displacement, high-revving engine.
When to Clean or Replace Your Air Filter
- Inspect after every ride in dusty, sandy, or wet conditions.
- Clean every 2-3 rides in moderate conditions.
- Replace if foam is torn, seams are coming apart, or persistent clogging occurs after cleaning.
Tools – Supplies You'll Need
- Service stand
- Latex or nitrile gloves (oil and grime cleanup)
- Foam filter cleaner (solvent or biodegradable type)
- Foam filter oil (specifically formulated for motorcycle foam filters)
- Lint-free rags
- Plastic bag or disposable gloves for oiling
Step-by-Step Air Filter Cleaning Instructions
-
Access the Air Filter:
Remove your seat by releasing the rear seat fastener. Open the airbox lid as specified in your manual. -
Remove the Filter:
Gently lift the filter from the cage and visually inspect for debris. Take care not to drop dirt into the air boot. -
Pre-Clean:
Use a dry rag to wipe out the airbox and prevent contaminants from entering the engine. -
Clean the Filter:
Submerge the foam filter in a dedicated foam cleaner or a bucket of warm, soapy water (mild dish soap works). Squeeze (do not wring or twist) the filter until oil & debris are removed. Repeat with clean water until no dirt remains. -
Dry:
Allow the filter to air-dry completely. Do NOT use compressed air or heat, as this can damage the foam structure. -
Inspect for Damage:
Check for tears, split seams, or hardened foam. Replace the filter if any damage is found. -
Oil the Filter:
Pour air filter oil evenly onto the foam, then place the filter in a plastic bag or use gloved hands to massage oil in until the entire surface has a light, even blue or red tint (depending on oil type). -
Install and Seal:
Reinstall the filter on its cage. Make sure the filter edges seal fully to the air box to avoid leaks. Secure any fasteners. -
Final Checks:
Verify no debris or tools are in the airbox. Refit the airbox cover and reinstall the seat.
Replacement Tips
- Carry a spare, pre-oiled filter for rapid swaps during long rides or race weekends.
- Consider a fresh filter every season, or sooner for extreme-use riders.
Maintenance Notes for 2018 Sherco 125SE-R Owners
- The high-revving two-stroke engine is sensitive to airflow changes–always ensure a fully sealed, properly oiled filter.
- Inspect the filter cage and sealing surface each service. Replace the cage if bent or cracked.
- Sherco's reinforced chassis maintains airbox integrity, but check regularly for cracks or warping, especially after a crash or tip-over.
- High-quality filters like the Twin Air, specifically designed for your year and model, blend airflow and protection to maintain the Sherco's trademark responsive performance.
Summary
Routine air filter service is the easiest way to safeguard your Sherco 125SE-R's potent two-stroke, extend engine life, and maintain peak off-road performance. Practice careful cleaning, inspect and oil thoroughly, and replace with OE-style filters for best results. MotoSport.com provides all the OEM replacement filters and service products you need to keep your ride ready for any trail.
Related Shopping Categories
Shop Air Filters for a 2018 Sherco 125SE-R Dirt Bike.
Shop Air Filter Oil for a 2018 Sherco 125SE-R Dirt Bike.
Shop Air Box Covers for a 2018 Sherco 125SE-R Dirt Bike.
Shop Tools for a 2018 Sherco 125SE-R Dirt Bike.
Shop Intake Parts for a 2018 Sherco 125SE-R 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.
