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How does FCR carb work?

How does FCR carb work?

The IDLE MIXTURE SCREW (FCR) controls fuel delivery to the idle port and the SCREW is located on the engine side of the carburetor slide. Turning the IDLE MIXTURE SCREW out will make idle and off-idle richer. Turning IDLE MIXTURE SCREW (CR, PWK, PJ, PE) controls the amount of air to the IDLE and SLOW CIRCUIT.

What does FCR carb stand for?

By The Wire. September 8, 2014. Sudco Press Release: Keihin FCR Carburetors are acknowledged as the leading carburetors in 4-stroke motorcycle racing thanks to their precise metering high flow, flat slide throttle design and adjustable accelerator pump.

How do you adjust a Keihin FCR fuel screw?

To adjust the Fuel Mixture Screw and Pilot Jet: Set the Fuel Mixture Screw to 1½ turns out, start the motorcycle and get the engine up to operating temperature. Slowly turn the screw in until the engine starts to slow down and then unscrew the Fuel Mixture Screw 1/2 of a turn.

How does Keihin CDK Check pop off pressure?

3.2 To check pop-off pressure, you need a pop-off pressure gauge capable of registering up to 50 psi. Wet the needle & seat assembly with WD-40 or gas. Place the pump nozzle in the center hole and pump until the pressure unseats the needle. Re-pump a few times to verify what point the pressure holds at.

Where is the leak jet on FCR carb?

the float bowl
The duration is tuned using the “leak jet” located in the float bowl (Part #42 on the schematic).

What makes the Keihin FCR-MX carburetor so special?

Ultimate off-road performance. Keihin has developed an FCR carburetor designed for the specialized needs of the off-road racer. The FCR-MX carburetor has many new features to take motocross and ATV performance to the next level. Over-flow drain joint and tube.

What parts are available for the Keihin FCR?

For FCR Genuine “KEIHIN” replacement parts. Kits include diaphragm, spring, “u-ring,” o-ring, and 4 x 8mm screws.Kits available for Keihin Downdraft & Horizontal carbs and Keihin FCR-MX carb. Made in Japan. For FCR single carburetor.

What is the SKU number for a Keihin carburetor?

Bolt 0136-812-1100 (SKU 021-150) 169. Bracket 1190-A11-2000 (SKU 021-850) FCR Rebuild kits, each kit contains genuine KEIHIN parts to rebuild one Keihin Flat-CR Smoothbore carburetor body.

What is the SKU number for a Keihin FCR MX coil spring?

FCR-MX Coil Spring All 16053-KT7-0030 (SKU 021-720) 264. Cover All 1230-869-7001 021-756 265. Cover Screw All 0136-839-1100 021-759 These are two different kits, the kit on the right contains 2 different types of middle body orings. 299. FCR Middle Body O-Ring Kit w/Screws 18-7968 adjustable leak jet. Designed for the Keihin FCR-MX carburetor, it