Road Racing Motorcycles & ATV

Keihin Flat-CR (FCR) Carburetor

Originally designed and developed on world-class Superbike racing circuits, the Flat-CR carburetor broke new technological ground with an innovative flat-slide throttle valve that rides on roller bearings. This practically frictionless design allows for much lighter throttle return springs and a finer degree of power control for riders. Produced with the highest level of technology available, the Flat CR has proven its advantage with race wins around the world.

Flat-CR Features and Benefits:

• Industry leading Keihin precision fit, finish, and hardware
• Smoothbore venturi for maximum air flow
• Throttle valves are supported by rollers and opened with a progressive linkage for smooth operation and control.
• Vacuum release plate (separates engine vacuum from the throttle valve)
• Equipped with accelerator pump for rapid acceleration without flat spots
• Available in down-draft and side-draft configurations from 28mm to 41mm throttle bore
• Modular design with single, dual, and multi cylinder applications for easy installation on popular motorcycles
• Easily tunable with a wide range of jetting parts available
• Throttle Position Sensor (TPS) available for some applications

FCR Carb Parts Diagram

Notice on Carburetor Installation, Tuning, and Repair

Other than exact replacement OEM Carburetors, all Keihin Aftermarket Carburetors and Tuning Components are sold "As Is" for Off Road / Racing Use Only and are not intended or approved for use on vehicles operated on Public Roads or in locations where applicable engine tampering and anti-pollution laws apply.