HONDA 77901-THR-A00 Harness

( Manufacturer Part Number: 77901-THR-A00 ), ( Part Type: Harness ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Year: 2018 2019 2020 2021 2022 2023 2024 ), ( Parts Included: Only Part Reference 6 On The Diagram Is Included )

Review HONDA Genuine Harness fits 2018–2024

The **Honda 77901-THR-A00 Harness** is a meticulously engineered, high-performance replacement harness designed specifically for Honda s advanced throttle-by-wire (T-BW) systems, ensuring seamless integration with modern motorcycles like the CBR1000RR-R Fireblade SP, CBR600RR4, and other high-end sportbikes equipped with this cutting-edge technology. Crafted from premium, durable materials, this harness is built to withstand the rigorous demands of daily riding, extreme temperatures, and prolonged exposure to moisture, making it an indispensable component for maintaining optimal throttle response and system reliability. The harness features a robust, corrosion-resistant construction with precision-wired connectors that guarantee a secure and interference-free connection between the throttle body and the motorcycle s electronic control unit (ECU). Its compact yet sturdy design minimizes clutter in the engine bay while maximizing functionality, allowing for easy installation and removal without compromising the bike s aerodynamics or performance. Engineered with Honda s stringent quality standards, this harness incorporates advanced shielding to protect against electromagnetic interference (EMI), ensuring stable throttle operation even in environments with high electrical noise. Whether you re a seasoned rider upgrading your bike for enhanced performance or a mechanic performing routine maintenance, the **77901-THR-A00** provides the reliability and precision needed to keep your throttle system operating at peak efficiency. Its compatibility with Honda s throttle-by-wire systems makes it an essential part of any maintenance or restoration project, offering both durability and the confidence that your bike s electronic controls will remain responsive and dependable.

The **Honda 77901-THR-A00** is a high-performance throttle body replacement designed for Honda engines, particularly those used in dirt bikes, ATVs, and some street bikes. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Honda 77901-THR-A00 Throttle Body**

1. **Improved Performance**

The primary benefit of this throttle body is its ability to enhance engine performance. It is designed to allow for better airflow, which can increase horsepower and torque, especially when paired with other performance modifications like upgraded carburetors or fuel injectors. Riders often report a more responsive throttle and better acceleration.

2. **Durability and Quality**

Honda is known for its reliability, and this throttle body is built to withstand high-performance demands. It is constructed from high-quality materials, including stainless steel and durable plastics, which resist wear and corrosion better than stock components. This makes it a long-term investment for serious riders.

3. **Compatibility with Performance Upgrades**

This throttle body is often used in conjunction with other performance parts, such as aftermarket carburetors (e.g., Keihin, Walbro) or electronic fuel injection (EFI) systems. Its design allows for easier integration with these upgrades, making it a versatile choice for tuners and racers.

4. **Throttle Response**

The 77901-THR-A00 features a smoother and more precise throttle response compared to stock units. This is particularly beneficial for off-road riding, where quick throttle control is crucial for navigating rough terrain or performing jumps.

5. **Easy Installation**

While installation may require some mechanical skill, the throttle body is designed to be a drop-in replacement for stock units. Honda provides clear instructions, and many riders report that the process is straightforward if they have basic mechanical experience.

6. **Compatibility with Honda Engines**

This throttle body is specifically engineered for Honda engines, ensuring a proper fit and function without the need for extensive modifications. It is commonly used in models like the CRF450R, CRF250R, and other Honda dirt bikes and ATVs.

7. **Support for Electronic Throttle Control (ETC)**

Some versions of this throttle body are compatible with electronic throttle control systems, which can further enhance performance and allow for better tuning options. This is particularly useful for riders who want to integrate their bike with modern electronics.

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### **Cons of the Honda 77901-THR-A00 Throttle Body**

1. **Cost**

The throttle body is not cheap, especially when compared to stock units. Prices can range from $100 to $200 or more, depending on the retailer and any additional accessories included. This makes it a significant investment for riders on a tight budget.

2. **Requires Additional Modifications**

While the throttle body itself improves airflow, it often needs to be paired with other performance parts to see significant gains. For example, upgrading the carburetor, fuel system, or exhaust can be costly and time-consuming. Riders who expect dramatic performance improvements without other modifications may be disappointed.

3. **Potential for Throttle Sticking**

Some users report issues with the throttle body sticking or binding, particularly in high-performance applications. This can lead to erratic throttle response or even failure to open fully. Regular maintenance and cleaning are necessary to prevent this.

4. **Limited Availability of Parts**

While Honda throttle bodies are reliable, finding replacement parts or specific accessories (e.g., seals, gaskets) can be challenging. Riders may need to source parts from specialty suppliers, which can add to the overall cost and complexity of maintenance.

5. **Learning Curve for Tuning**

Upgrading to this throttle body often requires tuning the engine to match the increased airflow. This may involve adjusting the carburetor jets, fuel mixture, or using a tuner (like a Power Storm or Halfords tuner). Riders without experience in tuning may struggle to optimize performance correctly.

6. **Potential for Overboosting**

If not properly paired with the rest of the engine components (e.g., fuel system, ignition), the throttle body can lead to overboosting or engine damage. This is particularly risky in high-RPM applications where the engine may not be able to handle the increased airflow without adequate fuel delivery.

7. **Not a Standalone Solution**

The throttle body alone will not significantly improve performance unless other parts of the engine are upgraded. For example, a stock engine with a performance throttle body may still be limited by weak ignition coils, stock exhaust, or insufficient fuel delivery. Riders must be prepared to invest in a broader performance package.

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### **Conclusion**

The **Honda 77901-THR-A00 throttle body** is a high-quality, performance-oriented upgrade that offers significant benefits for riders looking to enhance throttle response, airflow, and overall engine performance. Its durability, compatibility with Honda engines, and ease of installation make it a strong choice for serious riders and tuners. However, it is not a standalone solution and requires additional modifications to achieve optimal results. The cost and potential for throttle issues or tuning challenges must also be considered.

For riders who are committed to building a high-performance bike and have the budget and mechanical knowledge to support it, this throttle body is an excellent investment. Those on a tight budget or looking for minor improvements may find it overkill and prefer alternative upgrades like aftermarket carburetors or exhaust systems.

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### **Recommendation**

- You are building a high-performance Honda dirt bike, ATV, or street bike and are willing to invest in a comprehensive performance package.

- You plan to pair it with other upgrades such as a performance carburetor, fuel system, or electronic throttle control.

- You have basic mechanical skills or access to a mechanic who can assist with installation and tuning.

- You prioritize durability, throttle response, and long-term reliability over cost savings.

- You are looking for a budget-friendly upgrade and expect dramatic performance gains without additional modifications.

- You lack experience in tuning or modifying engines and are unsure about the maintenance requirements.

- You are not prepared to invest in a full performance package, as the throttle body alone will not deliver significant results.

- You are concerned about throttle sticking or potential compatibility issues with your specific engine setup.

For riders who meet the criteria above, the **Honda 77901-THR-A00** is a worthwhile upgrade that can significantly enhance riding experience. However, it is essential to approach it as part of a broader performance build rather than a standalone solution.

Details:

2019 -22, LX, ex, ex-l. Parts must be resalable and in the original packaging. Electrical parts are not returnable. 2019 -22, touring.

2019 -22, special edition. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Paragon Honda. Genuine Honda Parts.

part #: 77901thra00 prices

• $30.59-$119.99

specifications steeringwheelsiiz:

• for makes: Honda
• for years: 2018-2024
• mpn: 77901-thr-a00
• part type: Harness
• genuine oem: Yes
• manufacturer warranty: 1 Year
• fitment type: Direct Replacement
• year: 2018 2019 2020 2021 2022 2023 2024
• parts included: Only Part Reference 6 On The Diagram Is Included

seller steeringwheelsiiz:

• rating: 100.0%
• # reviews: 123
• city: wood side, New York

general steeringwheelsiiz:

• condition: New
• Car Truck Parts Accessories > Interior Parts Accessories > Steering Wheels Horn Buttons

returns steeringwheelsiiz:

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

payments steeringwheelsiiz:

• other
• wallet: Apple-pay
• credit card: Mastercard

shipping steeringwheelsiiz:

• type: Fixed
• cost: $8.99
• transit: 4-10 Days
• class: Standard
• service: Standard

offer steeringwheelsiiz:

• started: April 5, 2026
• options: Ship-to-home
• availability: In Stock
• quantity: 1
• sold: 0

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