Air Filter Cleaning & Replacement Guide for 2015 Yamaha TTR50
Shop parts for a 2015 Yamaha TTR50 Dirt Bike.
Keeping the air filter clean & properly maintained is crucial for your 2015 Yamaha TTR50–neglecting this task can lead to decreased performance, engine damage, and ultimately a shorter bike lifespan.
Why Air Filter Maintenance Matters for Your TTR50
A clean, well-oiled air filter ensures your dirt bike engine receives pure air without abrasive particulate matter. The TTR50 is a youth-focused, entry-level trail bike with a simple but effective air filtration system, featuring a foam filter element that's designed to be cleaned & reused rather than replaced after every ride. However, frequent maintenance—especially after riding in muddy, dusty, or wet environments—is essential for optimal performance.
Recommended Cleaning Intervals
- Check & clean the filter after every ride in dusty or wet conditions.
- For casual riders on clean trails, inspect the filter every 5–10 riding hours.
- Replace the filter if it's torn, deteriorating, or fails to seal properly. Never ignore damaged foam—this can allow dirt into the engine.
Tools & Supplies You'll Need
- Phillips screwdriver (to remove airbox bolts)
- Recommended parts-cleaning solvent (never use gasoline or low flashpoint solvents—fire risk.)
- Foam air filter oil
- Clean rags & gloves
Cleaning & Oiling Procedure–Step by Step (MotoSport Exclusive)
- Securely park your TTR50 on level ground with the engine off and cool.
- Remove the air filter cover: Locate the airbox on the left side. Remove the three Phillips head bolts. Carefully remove the cover—don't force any plastic tabs.
- Extract the filter: Pull out the foam air filter and the mesh screen behind it. Inspect for tears, breakdown, or lack of structure. Replace immediately if damaged.
- Clean the mesh screen: Rinse in approved solvent and wipe dry.
- Clean the foam filter: Immerse in parts-cleaning solvent, gently squeeze (never wring or twist)—repeat until dirt and old oil are gone. Rinse with clean solvent if necessary.
- Dry the foam: Let air dry naturally. Do not apply direct heat (hair dryers, sunlight, etc.)—this risks warping or melting the foam.
- Oil the foam: Pour recommended filter oil into a resealable bag, insert filter, & squeeze until saturated. Squeeze out excess oil until the filter is evenly coated, but not dripping.
- Reinstall: Place the mesh and oiled filter back into the airbox, ensuring a tight, uniform seal around the edges. Reinstall the cover and three bolts without overtightening.
- Inspect the drain tube: The airbox features a small drain plug—remove and inspect for any collected water or oil, and clean as needed.
- Environmental Note: Dispose of used oil, solvent, and damaged filters responsibly at a local waste facility—never pour into the ground or regular trash.
TTR50 Owner Notes
- The TTR50 filter construction is simple—perfect for DIY maintenance. However, OEM foam filters offer the best fit and durability. Generic filters may not seal correctly.
- Young riders and new owners should take extra care: a poorly seated filter or skipped cleaning can lead to costly engine repairs.
- Always check for a uniform bead of oil across the entire filter—a single dry spot can be a dirt entry point.
- Replace filter if there are signs of persistent engine bogging or a noticeable drop in throttle response, especially after multiple cleanings.
Common Questions
- Why not use gasoline for cleaning? Fire/explosion risk, and it degrades the foam rapidly. Only use manufacturer-approved solvent or specialized filter cleaners.
- Should I upgrade to a reusable filter? For most TTR50 owners, the OEM foam filter is ideal. If riding conditions are exceptionally dusty, consider an aftermarket high-performance unit compatible with the TTR50—ensure it fits properly before use.
- Chain Adjustment Note: While cleaning your filter, always check your TTR50's chain free play (35–45 mm) since a stretched chain is common after early hours of use.
Clean air keeps your TTR50 running strong, mile after mile. Rely on MotoSport.com for the widest selection of OEM and upgrade air filters for Yamaha dirt bikes—maintain peak performance and protect your investment.
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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.