KEIHIN 99101-393-70 Round Jet Fcr Vb Vd Ve Cvk Cvkr

( Brand: Keihin ), ( Type: Carburetor ), ( Machine Type: Off-road Motorcycle, Street Motorcycle, Atv ), ( Items Included: Round Main Jet ), ( Manufacturer Part Number: 99101-393-70 ), ( Features: Jetting ), ( Material: Brass ), ( Vintage Part: Yes ), ( Universal Fitment: No ), ( Country Of Origin: Japan )

Review KEIHIN Round Main Jet Fcr Vb Vd Ve Cvk Cvkr d

The Keihin 99101-393-70 FCR VB VD CVK CVKR-D is a high-performance carburetor designed for motorcycles, specifically for use with 2-stroke engines. This carburetor is part of Keihin's FCR (Fine Carburatoring System) series, which is renowned for its precise fuel delivery and ability to provide optimal engine performance.

The Keihin 99101-393-70 is a round jet carburetor, which means that it utilizes a circular shape for its main jet assembly. This design allows for finer adjustments to fuel mixture settings, resulting in improved engine response and efficiency. The jet sizes for this specific model range from 32 to 110, allowing riders to fine-tune their fuel mixture for various riding conditions and engine sizes.

This carburetor features a vacuum-secondary (VB) system, which utilizes a vacuum-operated diaphragm to control the fuel flow to the secondary jet. This system provides a richer fuel mixture during deceleration and idle, ensuring smooth engine operation and reduced emissions. The vacuum-secondary system also helps to eliminate the need for a choke, making starting easier and more reliable.

The Keihin 99101-393-70 FCR VB VD CVK CVKR-D also includes Keihin's CVK (Constant Vacuum) system. This system maintains a constant vacuum at the diaphragm, ensuring consistent fuel delivery and stable engine performance. The CVK system also helps to eliminate fuel starvation during hard acceleration or high-RPM riding, ensuring that the engine receives the correct fuel mixture at all times.

The carburetor body is made of durable aluminum alloy, which is both lightweight and corrosion-resistant. The carburetor also includes a number of adjustment options, including an adjustable idle mixture screw, an adjustable main jet needle valve, and an adjustable pilot jet needle valve. These adjustments allow riders to fine-tune their fuel mixture for their specific engine and riding conditions.

The Keihin 99101-393-70 FCR VB VD CVK CVKR-D is a high-performance carburetor that provides precise fuel delivery, improved engine response, and stable engine performance. Its round jet design, vacuum-secondary system, and CVK system make it an excellent choice for riders looking to optimize their 2-stroke motorcycle's engine performance.

The Keihin FCR VB/VD/VE CVK CVKR-D carburetor is a popular choice among motorcycle enthusiasts for its high performance and precise fuel delivery. Here are some pros and cons to help you make an informed decision about purchasing this carburetor:

1. High Performance: The Keihin FCR series carburetors are known for their high performance capabilities. They offer excellent throttle response, improved fuel economy, and increased power output.

2. Precise Fuel Delivery: The CVK and CVKR-D versions of this carburetor feature Keihin's unique "flat slide" design, which provides precise fuel delivery and improved air/fuel mixture for better combustion.

3. Adjustability: The Keihin FCR VB/VD/VE CVK CVKR-D carburetor offers a wide range of adjustability, allowing riders to fine-tune the carburetor to their specific engine and riding conditions.

4. Durability: Keihin carburetors are known for their durability and reliability. The FCR series carburetors are no exception, with high-quality components and robust construction.

5. Wide Applicability: The Keihin FCR VB/VD/VE CVK CVKR-D carburetor is available in various sizes and configurations, making it a versatile choice for a wide range of motorcycle applications.

1. Complexity: The Keihin FCR VB/VD/VE CVK CVKR-D carburetor is a complex piece of machinery, with numerous adjustments and components. This can make it more difficult to install and tune compared to simpler carburetors.

2. Cost: The Keihin FCR VB/VD/VE CVK CVKR-D carburetor is more expensive than some other aftermarket carburetors. This may be a consideration for budget-conscious riders.

3. Availability: Due to its popularity, the Keihin FCR VB/VD/VE CVK CVKR-D carburetor can be difficult to find in stock at local motorcycle shops. Online retailers may offer a wider selection, but shipping times and costs can be a factor.

The Keihin FCR VB/VD/VE CVK CVKR-D carburetor is a high-performance aftermarket carburetor that offers precise fuel delivery, adjustability, durability, and wide applicability. However, it comes with a higher cost and complexity compared to some other options. If you're looking for maximum performance and are willing to invest the time and resources into installation and tuning, the Keihin FCR VB/VD/VE CVK CVKR-D carburetor may be the right choice for you.

If you're considering purchasing the Keihin FCR VB/VD/VE CVK CVKR-D carburetor, I would recommend doing thorough research on the specific version that will work best for your motorcycle application. Consult online forums, motorcycle shops, and the Keihin website for installation instructions, tuning guides, and compatibility information. Additionally, consider the cost and availability of the carburetor, as well as your own mechanical abilities and budget. Ultimately, if you're looking for high performance and are willing to invest the time and resources, the Keihin FCR VB/VD/VE CVK CVKR-D carburetor is a solid choice.

part # 9910139370 prices

• $29.82-$39.84

specifications iodacarb:

• brand: Keihin
• type: Carburetor
• machine type: Off-road Motorcycle, Street Motorcycle, Atv
• items included: Round Main Jet
• manufacturer part number: 99101-393-70
• features: Jetting
• material: Brass
• vintage part: Yes
• universal fitment: No
• country of origin: Japan

returns iodacarb:

• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

general iodacarb:

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

seller iodacarb:

• rating: 100.0%
• # reviews: 362

shipping iodacarb:

• cost: $0.00
• carrier: USPS
• class: Standard
• transit: 6-12 Days
• service: USPS Ground Advantage
• type: Calculated

offer iodacarb:

• quantity: 1
• availability: In Stock
• options: Ship-to-home
• started: February 15, 2026
• sold: 0

payments iodacarb:

• credit card: Mastercard
• wallet: Paypal
• other

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