Air Filter Cleaning – Replacement Guide for 2017 Kawasaki KLX140L
Shop parts for a 2017 Kawasaki KLX140L Dirt Bike.
Maintaining your 2017 Kawasaki KLX140L means paying close attention to the air filter, a component vital for keeping the engine breathing clean while protecting it from harmful dust and dirt. This guide from MotoSport.com outlines everything KLX140L owners need to know about cleaning and replacing their air filter—with model-specific advice, proprietary tips, and must-have info for this dirt bike.
Unique KLX140L Air Filter Features
- Airbox & Filter Access: The KLX140L's air filter is housed on the left-hand side beneath a protective cover with four 8mm bolts. Removing these allows quick access to the air filter and its frame–no complicated panels or hardware to navigate.
- Snorkel Design: The stock airbox uses a snorkel, which channels intake air and typically leaves a concentrated dirty spot on the filter. This makes regular inspection and cleaning essential to safeguard engine performance.
- Two-Stage Foam Filters: Both OEM and aftermarket filters for this bike (such as Tusk, UNI, and No Toil) use dual-stage, high-quality foam designed to maximize filtration and airflow. These filters use different pore sizes and flame-laminated construction for increased durability and dirt-catching capacity.
How Often Should You Clean?
- Clean the air filter after every 2–3 rides in dusty conditions, or every 5 hours of riding in standard environments. For racing or heavy off-road use, increase cleaning frequency accordingly.
- If you notice excess dirt concentrated where the snorkel meets the filter, inspect and clean immediately, as this is where most debris enters the airbox.
MotoSport Proprietary KLX140L Air Filter Cleaning Guide
- Remove Airbox Cover: Use an 8mm wrench or T-handle to remove the four bolts securing the left-side airbox cover. Pop the cover off to expose the air filter. Ensure the rubber grommet stays on the bike framedon't let it come off with the side cover.
- Extract the Air Filter: Simply pull the filter out with its window/frame. Check the filter and the airbox for any loose dirt or debris.
- Inspect: Look for dirt deposits and check for tears or damage to the foam. If the filter is torn, brittle, or excessively dirty, replace it with a new one.
- Clean: Rinse the filter in a dedicated foam filter cleaner or mild dish soap in warm water. Gently squeeze (do not wring) the foam to remove grime. Rinse thoroughly and repeat if needed.
- Dry Completely: Lay the filter flat to air dry. Avoid compressed air or heat sources, which can damage the foam's structure.
- Re-Oil: When fully dry, apply specific foam filter oil evenly. Ensure the oil covers every part of the filterinspect for even coloration if using lighter-colored filters.
- Reinstall: Seat the filter snugly in the airbox, verifying the thick foam base and sealing ring fully cover the air intake surface for a tight seal.
- Replace Cover: Reattach the airbox cover, tighten all bolts securely, and check the snorkel for proper positioning.
Kawasaki KLX140L Model-Specific Notes
- The KLX140L shares its filter architecture with the KLX140, KLX140G, and later KLX140R models, but always confirm fitment when purchasing replacements.
- Dual-stage foam and flame-laminated filters withstand rough conditions typical of off-road riding. For best protection and airflow, choose parts matched for the KLX140L's specific airbox size and sealing requirements.
- If performance drops or the bike runs rich, inspect for clogged filter areas at the snorkelthis is a known feature in the KLX140L design that concentrates dirt in a single spot.
- Improperly sealed filters can result in dust bypassing the filteralways verify a snug fit, especially around the base ring and sealing grommet.
Replacing the Air Filter
- Replace your KLX140L air filter annually or sooner if the foam loses elasticity, develops tears, or remains visibly dirty after cleaning.
- Choose a high-quality replacementMotoSport.com offers trusted options like Tusk, UNI, and No Toil, designed with dual-stage, heat-sealed technology for long-lasting filtration and performance.
Pro Tips from MotoSport Experts
- Label and date your filters to track cleaning cycles—this helps prevent forgetful maintenance.
- Stock a spare pre-oiled filter for easy swap-outs during multi-day rides.
- Always re-oil after cleaning—running a dry foam filter risks catastrophic engine damage.
- Dispose of excessively dirty or damaged filters promptly, as damaged foam undermines airbox sealing and engine longevity.
Related Shopping Categories
Shop Air Filters for a 2017 Kawasaki KLX140L Dirt Bike.
Shop Air Filter Oil for a 2017 Kawasaki KLX140L Dirt Bike.
Shop Air Box Covers for a 2017 Kawasaki KLX140L Dirt Bike.
Shop Tools for a 2017 Kawasaki KLX140L Dirt Bike.
Shop Intake Parts for a 2017 Kawasaki KLX140L 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.
