Hammerhead Designs Big Air Fuel Screw

Hammerhead Designs Big Air Fuel Screws allow fast tool free tuning of the fuel mixture ratio in Keihin FCR Carburetors. Quickly deliver crisp clean throttle response with the twist of a finger. Laser etched numbers help with tuning and recording settings. All Big Air Screws come with springs, washers and O-Rings.

The Hammerhead Big Air Fuel Mix Screw is CNC machined from T6 Alloy, and incorporates an o-ring design to eliminate movement of the fuel mixture screw under prolonged engine vibration.

Available for four stroke bikes using the Keihin FCR carburetor.

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