KEIHIN B78A Amf Carburetor Carb P88D RD179

( Brand: Keihin ), ( Choke Type: Mechanical ), ( Type: Carburetor ), ( Manufacturer Part Number: B78A )

Review KEIHIN Harley Davidson Amf Carburetor Carb fits SHOVELHEAD

The Keihin B78A carburetor is a high-performance carburetor specifically designed for Harley-Davidson's Air-Cooled, Flat-Head, Shovelhead engines with part numbers P88D and RD179. This carburetor is part of Keihin's B-Series line, which is renowned for its exceptional fuel atomization and air-fuel mixture delivery.

This B78A carburetor features a 38mm throttle bore diameter, which ensures optimal airflow and power delivery. The bore size is suitable for Harley-Davidson's larger engines, providing the required fuel and air mixture for impressive torque and horsepower. The carburetor's design includes a single-plane intake manifold, which enhances the engine's intake velocity and efficiency.

The Keihin B78A carburetor is equipped with a constant vacuum secondary system, which maintains a consistent vacuum in the secondary circuit. This system ensures smooth fuel delivery and proper mixture adjustment, resulting in improved engine performance and fuel efficiency. The carburetor also includes an automatic choke mechanism, which simplifies the starting process, especially during colder weather.

The B78A carburetor's float bowl capacity is 4.2 ounces, ensuring a consistent fuel supply to the engine during various operating conditions. The float bowl is designed with a flat, wide design that minimizes fuel sloshing and maintains a stable fuel level, contributing to improved engine performance and reliability.

The Keihin B78A carburetor is constructed using high-quality materials that ensure durability and longevity. The carburetor's body is made from cast aluminum, which is both lightweight and resilient to the harsh conditions of constant engine heat and vibration. The carburetor's internal components, such as the needles, jets, and float, are made from stainless steel or brass materials to resist corrosion and wear.

Installation of the Keihin B78A carburetor is a straightforward process. The carburetor comes with all necessary hardware for a standard installation, including mounting brackets, gaskets, and bolts. The carburetor also includes a detailed installation manual to guide users through the process.

In summary, the Keihin B78A carburetor is a high-performance, durable, and reliable carburetor designed specifically for Harley-Davidson's Air-Cooled, Flat-Head, Shovelhead engines with part numbers P88D and RD179. Its large 38mm throttle bore, constant vacuum secondary system, and automatic choke mechanism contribute to improved engine performance, fuel efficiency, and ease of use. The carburetor's durable construction from high-quality materials ensures longevity and reliability, making it an excellent choice for Harley-Davidson enthusiasts seeking to enhance their engine's power and efficiency.

The Keihin B78A carburetor is a popular aftermarket carburetor option for Harley-Davidson Shovelhead engines, specifically those using the P88D intake and RD179 air cleaner. Here are some potential pros and cons of purchasing this carburetor.

1. Improved Performance: The Keihin B78A is known for providing better overall performance compared to the stock Harley-Davidson carburetors. This includes improved throttle response, faster idle stabilization, and increased power output.

2. Easier Tuning: The Keihin B78A is considered easier to tune than the stock Harley-Davidson carburetors. It features a more straightforward adjustment process and allows for finer adjustments, resulting in a smoother running engine.

3. Better Fuel Economy: The Keihin B78A is designed to provide better fuel efficiency than the stock carburetor. This can result in longer rides between fuel stops and reduced fuel costs.

4. Durability: The Keihin B78A is known for its durability and resistance to wear and tear. This makes it a popular choice for riders who put a lot of miles on their bikes.

1. Cost: The Keihin B78A is more expensive than the stock Harley-Davidson carburetor. This may be a deterrent for some riders on a budget.

2. Installation: Installing the Keihin B78A can be more complex than installing the stock carburetor. This may require additional time, tools, and expertise.

3. Unique Settings: The Keihin B78A may require unique settings for optimal performance, which may not be immediately available online or from other riders. This can make it more difficult for some riders to get their bike running correctly.

The Keihin B78A carburetor can provide significant improvements in performance, tuning, fuel economy, and durability compared to the stock Harley-Davidson carburetor. However, it comes with a higher cost, more complex installation process, and the need for unique settings. Ultimately, the decision to purchase the Keihin B78A depends on the rider's priorities, budget, and level of expertise.

If you're looking for improved performance, easier tuning, better fuel economy, and durability, the Keihin B78A is a strong consideration. However, if you're on a tight budget or not comfortable with more complex installations, the stock Harley-Davidson carburetor may be a better option for you. Regardless of your decision, it's important to ensure that you have the proper tools and expertise to install and tune the carburetor correctly for optimal performance.

part # b78a prices

• $25.00-$200.00

specifications iodacarb:

• for models: Shovelhead
• for makes: Harley, Davidson
• brand: Keihin
• choke type: Mechanical
• type: Carburetor
• manufacturer part number: B78A

shipping iodacarb:

• cost: $0.00
• type: Fixed
• service: Standard
• transit: 4-9 Days
• class: Standard

general iodacarb:

• condition: For parts or not working
• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Carburetors

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• policy: No Returns

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• sold: 0
• started: June 26, 2025
• quantity: 1
• options: Ship-to-home
• availability: In Stock
• best offers: True

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• rating: 98.3%
• # reviews: 3929

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