K&N Motorcycle Oil Filter KN-138 — High-Performance Synthetic Media, Long-Life Protection up to 20,000 mi

K&N KN-138 is a high-performance motorcycle oil filter engineered to deliver increased engine protection and sustained high oil flow for extended service intervals. K&N designed this powersports oil filter to meet the demands of modern motorcycles and ATVs by combining premium synthetic filter media with heavy-duty construction. It replaces factory filters on many Aprilia and Suzuki models and is built for riders who want reliable filtration, fast oil changes and compatibility with synthetic and conventional oils. The KN-138 emphasizes durability and consistent flow so engines run cleanly under varied riding conditions.

How does the KN-138 improve engine protection?

The KN-138 uses high-efficiency synthetic media arranged in uniform pleats to trap contaminants while maintaining oil flow. Its construction is tested for capacity and burst strength to resist collapse under pressure spikes typical in spirited riding.

• Premium synthetic filter media captures fine particles without restricting flow.
• Uniform pleat design increases surface area for longer service life.
• Laboratory-tested capacity and burst strength for dependable protection.

Can this filter handle long service intervals and synthetic oils?

This filter is engineered for extended protection and is compatible with synthetic, conventional and blended oils. K&N rates the KN-138 for up to 20,000 miles under appropriate conditions, making it a practical choice for riders using long-life oil change schedules.

• Rated for long-life protection—designed for extended mileage between changes.
• Optimized bypass/pressure relief valve specific to the part number.
• Works with high-end synthetic oils and standard oil types.

What makes installation and maintenance easier for riders?

The KN-138 includes user-friendly design touches to simplify service. An integrated welded nut on the filter body lets you remove and install the filter quickly with common tools, helping reduce shop time or roadside hassle.

• Integrated welded nut for faster, more secure oil changes.
• Direct factory replacement fit for compatible models—no modifications needed.
• Sturdy canister body resists deformation during service and operation.

Which motorcycles and ATVs is the KN-138 compatible with?

The KN-138 fits a wide range of Aprilia and Suzuki models across many model years, including sportbikes, adventure bikes and select ATVs. Always verify fitment for your specific year and model before purchase to ensure correct application.

• Fits multiple Aprilia models like RS 660 and Tuono variants across recent years.
• Compatible with many Suzuki models including V-Strom, GSX, GSXS, SV650 and King Quad series.
• Designed as an application-specific direct replacement where applicable.

Who is this for The K&N KN-138 is aimed at riders, technicians and powersports enthusiasts who want a durable, high-flow oil filter that supports longer oil intervals and performs well with synthetic oils. It's a good match for owners of compatible Aprilia and Suzuki bikes who value improved filtration, straightforward installation and a robust filter body built to withstand demanding riding conditions.

FAQ

Q: Is the KN-138 compatible with synthetic oil?

A: Yes. The KN-138 is optimized for use with synthetic, blended, and conventional oils.

Q: How often should I change the KN-138 filter?

A: K&N rates it for up to 20,000 miles under suitable conditions; follow your vehicle and oil manufacturer's recommendations.