KEIHIN 7OU121 Carburetor Flat Slide

( Brand: Keihin ), ( Engine Type: 4-stroke ), ( Type: Carburetor ), ( Manufacturer Part Number: 7OU121 )

Review KEIHIN Yamaha Oem Carburetor Flat Slide fits YZ450F 450F YZ CR 2006–2009

The Keihin FCR-MX38 flat slide carburetor, specifically modeled for the Yamaha YZ450F and YZ 450F motorcycles manufactured between 2006 and 2009, is a high-performance component designed to optimize your off-road riding experience. This carburetor features a unique flat slide design that allows for precise fuel delivery and consistent power throughout the entire RPM range.

The Keihin FCR-MX38 utilizes a 38mm throttle body, which is larger than most standard motorcycle carburetors. This increased size allows for more airflow, resulting in improved engine performance and responsiveness. The carburetor body is made from lightweight aluminum, reducing unsprung weight and contributing to better handling and agility.

One of the most notable features of this carburetor is its flat slide design. The slide is flat and horizontal, unlike traditional round slides that can cause inconsistent fuel delivery due to their vertical orientation. The flat slide design ensures that fuel is metered evenly, providing smooth power delivery and enhanced throttle response.

Another advanced feature of the Keihin FCR-MX38 is its Mikuni TPS (Throttle Position Sensor). This sensor allows the fuel injection system to adjust fuel delivery based on the position of the throttle, ensuring optimal fuel-air mixture and improved engine efficiency.

The carburetor also comes with a convenient adjustable idle circuit. This feature allows riders to easily set the idle speed to their preference, ensuring a stable engine idle and improved cold starting. The idle jet and needle are easily accessible and adjustable, making it simple to fine-tune the carburetor for different riding conditions.

Additionally, the Keihin FCR-MX38 features a secondary fuel metering jet. This jet is designed to provide an additional fuel supply during high RPM operation, ensuring that the engine receives the optimal fuel mixture for peak performance.

The carburetor is also equipped with a float bowl drain plug, making it easy to drain the float bowls for maintenance or cleaning. The carburetor comes with a gasket set, making installation simple and hassle-free.

In summary, the Keihin FCR-MX38 flat slide carburetor is a high-performance component specifically designed for the Yamaha YZ450F and YZ 450F motorcycles manufactured between 2006 and 2009. Its unique flat slide design ensures precise fuel delivery and consistent power throughout the RPM range, while its large 38mm throttle body and advanced features like the Mikuni TPS and adjustable idle circuit provide improved engine performance and responsiveness.

The Keihin FCR flat slide carburetor, specifically the model used on Yamaha YZ450F motorcycles between 2006 and 2009, is a popular choice among off-road riders due to its ability to deliver precise fuel mixtures for optimal engine performance. However, like any other part, it comes with its advantages and disadvantages.

1. Adjustability: The FCR carburetor offers a high degree of adjustability, allowing riders to fine-tune the fuel mixture for various riding conditions and personal preferences.

2. Power Delivery: This carburetor is known for delivering smooth and consistent power throughout the rev range, making it a popular choice among racers.

3. Durability: The Keihin FCR carburetor is built to withstand the rigors of off-road racing, making it a reliable choice for those who ride in harsh conditions.

1. Complexity: The FCR carburetor is more complex than some other carburetors on the market, which can make it more difficult to set up and maintain.

2. Cost: Replacement parts for the FCR carburetor can be expensive, which may make it less cost-effective for some riders.

3. Fuel Consumption: The Keihin FCR carburetor may consume more fuel than some other carburetors, which can be a concern for riders who prioritize fuel efficiency.

In conclusion, the Keihin FCR flat slide carburetor offers numerous advantages for off-road riders, including adjustability, power delivery, and durability. However, it also comes with some disadvantages, such as complexity, cost, and fuel consumption. Ultimately, the decision to purchase this carburetor depends on the rider's priorities, budget, and riding style.

If you are a serious off-road racer who values power and adjustability, the Keihin FCR carburetor is a worthy investment. However, if you are looking for a more cost-effective or simpler option, you may want to consider other carburetor models.

If you are in the market for a high-performance carburetor for your off-road motorcycle and have the budget for it, the Keihin FCR flat slide carburetor is a great choice. Its adjustability, power delivery, and durability make it a popular choice among racers. However, if you are on a tighter budget or prefer a simpler option, you may want to consider other carburetor models that offer similar performance at a lower cost.

part # 7ou121 prices

• $299.00-$299.99

specifications iodacarb:

• for models: Yz450f, 450f, Yz, Cr
• for makes: Yamaha
• for years: 2006-2009
• brand: Keihin
• engine type: 4-stroke
• type: Carburetor
• manufacturer part number: 7OU121

general iodacarb:

• condition: Used
• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Carburetors

offer iodacarb:

• sold: 0
• started: May 30, 2025
• availability: In Stock
• options: Ship-to-home
• best offers: True
• quantity: 1

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• policy: No Returns

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seller iodacarb:

• rating: 97.1%
• # reviews: 647

shipping iodacarb:

• carrier: USPS
• class: Expedited
• type: Calculated
• transit: 7-13 Days
• cost: $0.00
• service: USPS Priority Mail

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