HONDA 645B Keihin Carburetor

( Part Type: Carburetor ), ( Manufacturer Part Number: 645B )

Review HONDA Oem Xl Keihin Carburetor fits XR 250

The Honda 645B XL/XR 250 Keihin Carburetor is a high-performance fuel delivery system designed specifically for Honda XR250 and XL250 motorcycles. This carburetor is manufactured by Keihin, a world-renowned leader in producing carburetors for motorcycles and other internal combustion engines.

The Honda 645B carburetor features a flat slide design with a 250cc capacity. The flat slide design allows for optimal air-fuel mixture and combustion efficiency. The carburetor is equipped with a main jet size of 140 and a pilot jet size of 32. This configuration provides a good balance of power and fuel economy for the XR250 and XL250 models.

The Keihin carburetor comes with an idle jet, which is essential for maintaining a consistent idle speed. The needle and seat jet system allows for easy adjustment of the idle speed and mixture. Moreover, the carburetor has a throttle position sensor (TPS) port for electronic fuel injection (EFI) conversion, making it a versatile option for riders who wish to upgrade their bikes.

The carburetor's body is made of durable cast aluminum, ensuring robustness and resistance to corrosion. The float bowls are designed with a large-capacity design to reduce the frequency of refueling, making it ideal for long-distance rides. The carburetor also has an automatic petcock, which prevents fuel from flowing back into the float bowls when the bike is not running.

The Honda 645B XL/XR 250 Keihin Carburetor is easy to install and comes with all necessary hardware for mounting. The installation process is straightforward, and the carburetor includes a gasket and mounting bolts to ensure a secure fit. The carburetor also comes with a gasket for the air cleaner base, making it a complete kit for the motorcycle.

In conclusion, the Honda 645B XL/XR 250 Keihin Carburetor is a high-performance and durable fuel delivery system designed for Honda XR250 and XL250 motorcycles. Its flat slide design, large-capacity float bowls, and easy adjustability make it an ideal option for riders seeking optimal power and fuel efficiency. The carburetor's durable cast aluminum body and automatic petcock ensure a long-lasting and reliable fuel delivery system.

Honda 645B XL/XR 250 motorcycles, equipped with a Keihin carburetor, are popular choices among riders due to their reliability, fuel efficiency, and easy maintenance. However, like any other engine system, it has its pros and cons.

1. Fuel Efficiency: The carbureted engine provides excellent fuel efficiency, making it a cost-effective option for regular commuters.

2. Easy Repair and Maintenance: Carbureted engines are generally easier to repair and maintain compared to fuel-injected systems. Replacement parts are readily available, and adjustments can be made quickly.

3. Smooth Power Delivery: The Keihin carburetor offers smooth power delivery throughout the RPM range, which is beneficial for both city and highway riding.

4. Affordability: The Honda 645B XL/XR 250 motorcycles with carburetors are typically less expensive than their fuel-injected counterparts.

1. Less Fuel Efficient in Cold Conditions: Carburetors can be less fuel-efficient in cold temperatures, as they may require more fuel to warm up properly. This can result in increased fuel consumption and higher operating costs.

2. Less Consistent Performance: Carburetors can sometimes provide inconsistent performance due to factors such as temperature, altitude, and fuel quality. This can lead to variations in power delivery and fuel efficiency.

3. Requires Regular Adjustments: Carburetors require regular adjustments to maintain optimal performance. This can include adjusting the idle, fuel mixture, and air intake. While this is a relatively simple process, it can be time-consuming for riders who are not mechanically inclined.

The Honda 645B XL/XR 250 motorcycle with a Keihin carburetor is a reliable and cost-effective option for riders. Its ease of repair and maintenance, smooth power delivery, and affordability make it an attractive choice. However, its less consistent performance in cold conditions and the need for regular adjustments may be considered drawbacks for some riders. Ultimately, the decision to purchase a motorcycle with a carbureted engine depends on individual preferences, riding style, and budget.

If you are looking for a motorcycle that is easy to maintain, fuel-efficient, and offers a smooth riding experience, the Honda 645B XL/XR 250 with a Keihin carburetor is an excellent choice. However, if you prefer consistent performance in various weather conditions and are willing to pay a higher price for the convenience of a fuel-injected system, you may want to consider other options. Ultimately, it is important to weigh the pros and cons carefully and make an informed decision based on your specific needs and preferences.

part # 645b prices

• $79.99-$250.00

specifications iodacarb:

• for models: Xr, 250
• for makes: Honda
• part type: Carburetor
• manufacturer part number: 645B

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shipping iodacarb:

• cost: $0.00
• class: Standard
• service: USPS Ground Advantage
• carrier: USPS
• type: Fixed
• transit: 3-7 Days

general iodacarb:

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

offer iodacarb:

• options: Ship-to-home
• started: September 8, 2025
• quantity: 1
• sold: 0
• availability: In Stock

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• policy: No Returns

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• # reviews: 26551
• rating: 100.0%

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