K&N 2004-2006 Yamaha YZF R1 Replacement Air Filter

K&N Air Filter for 2004-2006 Yamaha YZF R1 | Max Performance (YA-1004)

Boost your 2004-2006 Yamaha YZF R1’s horsepower and acceleration with a premium K&N replacement air filter. Washable, reusable, and built to last. 

Unlock the true potential of your liter-bike with the K&N Replacement Air Filter, engineered explicitly for the iconic 2004–2006 Yamaha YZF-R1. Designed as a direct drop-in replacement for your restrictive, factory paper filter, this high-flow upgrade utilizes K&N's legendary oiled-cotton media. By smoothing and straightening the airflow into your R1's fuel injection system, it significantly decreases air intake restriction to help your high-revving engine breathe easier.

The result? Crisp throttle response, improved acceleration, and an increase in overall horsepower across the powerband—all without sacrificing filtration efficiency. K&N filters feature pleated layers of premium cotton gauze sandwiched between epoxy-coated aluminum wire mesh, trapping harmful dust and debris while maintaining exceptional flow rates.

Best of all, this is the last air filter your bike will ever need. It comes pre-oiled and ready to install directly into your factory airbox with no modifications required. When it gets dirty, simply wash, re-oil, and reinstall it to restore peak performance.

Best Uses

1. Performance Upgrades: Ideal for sportbike riders wanting to maximize horsepower and throttle response from their 2004–2006 Yamaha R1.
2. Track Days & Aggressive Street Riding: Perfect for high-RPM demands where consistent, unrestricted airflow is critical to optimal engine power.
3. Eco-Conscious & Cost-Efficient Maintenance: Designed for riders who prefer a sustainable, reusable filter over buying disposable paper filters every service interval.

Features

1. High-Flow Cotton Media: Constructed with multiple layers of premium woven cotton gauze that deliver up to 50% more airflow than stock paper filters.
2. Custom Drop-In Fit: Specifically molded to fit perfectly inside the original 2004–2006 Yamaha YZF-R1 airbox, functioning as a seamless application-specific upgrade.
3. Washable and Reusable: Engineered to be cleaned and re-oiled time and time again using a K&N filter care service kit.
4. Epoxy-Coated Aluminum Mesh: Features a durable wire grid design that holds the pleated shape firmly against harsh engine suction and prevents warping.
5. Pre-Oiled from the Factory: Ships fully treated with K&N's special formula air filter oil so you can open the box and install it immediately.

Benefits

1. Increased Horsepower & Acceleration: By eliminating restrictive air barriers, it allows your R1 to pull in more oxygen faster, improving top-end speed and acceleration.
2. Lifetime Financial Savings: Eliminates the ongoing cost of purchasing standard disposable air filters over the lifespan of your motorcycle.
3. Excellent Engine Protection: Provides state-of-the-art filtration that captures dirt and contaminants, keeping your combustion chamber free of abrasive particles.
4. No Tuning Required: Works perfectly right out of the box with stock engine settings and factory computer mapping.
5. Eco-Friendly Design: Reduces landfill waste by replacing single-use paper filters with a durable, long-term performance alternative.

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