Intake System-Yamaha

The K&N Engineering Intake System for Yamaha (RK-3940) is purpose-built to maximize airflow to your engine while maintaining precise filtration. This intake system is engineered for riders and mechanics who understand that factory air restrictors cost real horsepower and throttle response. Whether you're restoring a vintage Yamaha, upgrading a weekend warrior, or optimizing a street-legal build, this K&N system delivers measurable gains in volumetric efficiency without sacrificing engine protection.

K&N's reusable air filter technology and optimized intake tract design work together to reduce intake restriction compared to stock systems. The system features a direct-fit design that integrates seamlessly with Yamaha's fuel management and ignition timing, eliminating the need for costly ECU remapping. The compact footprint—measuring 9.5 by 4.875 by 11.75 inches and weighing just 4.06 pounds—makes installation straightforward, allowing you to bolt this upgrade without modification to existing mounting points or fuel lines. K&N's engineering balances flow capacity with sustained filtering performance, so your engine breathes cleaner air at higher volumes.

This intake system benefits street riders, track enthusiasts, and mechanics performing complete engine refreshes who want bolt-on performance without extensive tuning. Installation requires only basic hand tools and takes under an hour—no special equipment or professional dyno work necessary. Compatibility is exact for Yamaha platforms specified in the RK-3940 designation; verify your model year and engine size against K&N's fitment guide before ordering. The reusable filter element can be cleaned and inspected every 15,000 miles, making this a cost-effective long-term upgrade that pays for itself through improved throttle feel and fuel efficiency gains on both street and sport applications.