Review on K&N Universal Clamp-On Air Filter: High Performance Replacement Engine Filter - Flange Diameter: 🔍 2.4375 In, Filter Height: 6 In, Flange Length: 0.625 In - Oval Straight Shape (RC-3680) by John Graves

What can be said about K&N that hasn't already been said? Amazing product quality and it works as it should. Note that if your bike is carbureted and you install this filter you will need to adjust the fuel mixture (more air = leaner so you need to enrich the mixture) by either adjusting the air/fuel mixture screw or (most likely ) Restart carburetor. If your bike is equipped with FI, you will need to remap the ECM or install an additional fuel regulator (Vance & Hines, Dynojet, Cobra, etc.). If your bike ever rides in the rain (and it should), you'll need a rain cover for this filter. Be sure to also add a canister of filter oil before purchasing as this filter comes unfinished.