1. ATV Transmission & Drivetrain Parts Deals
  2. sku: 13237602061156762
  3. RACE DRIVEN F-401745

RACE-DRIVEN F-401745 Rear Sprocket 39T

fits model: Trx250x, 250x. make: Honda. year: 1989–1990.

F-401745 Race-driven 1989 1990 Honda Trx250x 250x 39t Rear Black Sprocket

( Brand: Race-driven ), ( Part Type: Sprocket ), ( Manufacturer Part Number: F-401745 ), ( Material: Stainless Steel )

Review RACE DRIVEN Honda 39t Rear Black Sprocket fits TRX250X 250X 1989–1990

The Honda TRX250X, manufactured between 1989 and 1990, is an iconic all-terrain vehicle (ATV) from Honda's history. One of its essential components is the race-driven 39T rear sprocket (part number F-401745) that plays a crucial role in the vehicle's drivetrain system.

This rear sprocket is meticulously crafted to deliver optimal performance for the TRX250X. Its primary function is to transmit power from the engine to the drive wheels via the drive chain. With a tooth count of 39, this sprocket offers an ideal gear ratio for the ATV, ensuring smooth and efficient power transfer.

The F-401745 39T rear sprocket is made from high-strength steel to ensure durability and longevity. Its teeth are precision-machined to ensure a perfect fit and engage securely with the drive chain. The sprocket's design is also optimized for cooling, which is crucial for preventing overheating and maintaining the overall performance of the ATV.

The race-driven nature of this sprocket signifies that it is designed for high-performance applications, such as racing or heavy-duty use. Its robust construction and superior design make it suitable for handling the increased power and torque demands that come with such applications.

Installing the F-401745 39T rear sprocket on your Honda TRX250X is a straightforward process. Simply remove the old sprocket, clean the splines on the drive shaft and the sprocket hub, and then install the new sprocket, making sure the teeth engage correctly with the drive chain. Properly torquing the sprocket bolts to the manufacturer's specifications is also essential for ensuring a secure and long-lasting installation.

If you're looking to enhance the performance of your Honda TRX250X or are in need of a replacement rear sprocket, the race-driven F-401745 39T rear sprocket is an excellent choice. Its high-strength steel construction, precision machining, and optimized design make it an ideal component for your ATV, ensuring smooth, efficient power transfer and long-lasting durability.

The Honda TRX250X is a popular quad bike model produced by Honda between 1989 and 1990. Replacing the rear sprocket, specifically a 39T race-driven unit like the F-401745, can enhance the performance of your TRX250X. Here are some pros and cons to consider before making a purchase.

Pros:

1. Improved acceleration: A larger rear sprocket reduces the number of rotations required to turn the wheel, resulting in quicker acceleration.

2. Increased top speed: With a larger rear sprocket, you can reach higher top speeds due to a more direct drive from the engine to the wheels.

3. Better hill climbing ability: The increased torque provided by a larger rear sprocket can help improve the quad's hill climbing capability.

Cons:

1. Reduced low-end torque: A larger rear sprocket may result in reduced low-end torque, making it more difficult to start and maneuver in tight spaces.

2. Increased engine revs: With a larger rear sprocket, the engine will need to rev higher to maintain the same speed, which can put more stress on the engine and transmission.

3. Shortened belt life: A larger rear sprocket can cause the drive belt to wear out more quickly due to increased tension and stress.

Conclusion:

Ultimately, the decision to buy a 39T race-driven rear sprocket for your Honda TRX250X depends on your specific riding style and needs. If you prioritize top speed and acceleration, this upgrade could be beneficial. However, keep in mind that it may come with trade-offs such as reduced low-end torque, increased engine revs, and shortened belt life.

Recommendation: If you decide to purchase a larger rear sprocket for your Honda TRX250X, I would recommend that you also consider the following:

1. Consult the Honda service manual or a knowledgeable mechanic to ensure proper installation and adjustment.

2. Use a high-quality drive belt designed for the increased tension and stress.

3. Regularly check and maintain the drive belt to ensure its longevity.

4. Be prepared for the potential trade-offs in terms of low-end torque, engine revs, and belt life.

part # f401745 price

  • $32.42

specifications utvshift:

  • for models: Trx250x, 250x
  • for makes: Honda
  • for years: 1989-1990
  • brand: Race-driven
  • part type: Sprocket
  • manufacturer part number: F-401745
  • material: Stainless Steel

payments utvshift:

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shipping utvshift:

  • class: Standard, Expedited
  • transit: 3-6 Days
  • carrier: USPS, FedEx
  • type: Fixed
  • service: USPS Ground Advantage, FedEx 2Day
  • cost: $0.00

returns utvshift:

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

general utvshift:

  • ATV, Side-by-Side UTV Parts Accessories > Transmission Drivetrain > Other Transmission Drivetrain Parts
  • condition: New

offer utvshift:

  • quantity: 10
  • options: Ship-to-home
  • started: April 26, 2026
  • availability: In Stock
  • sold: 0

seller utvshift:

  • # reviews: 20454
  • rating: 99.8%
for models: trx250x, 250x, for makes: honda, for years: 1989-1990, part type: sprocket,
category: atv parts > atv, side-by-side utv parts accessories > transmission drivetrain > transmission drivetrain parts, material: stainless steel, sku: 13237602061156762,

Race-driven F-401745 Is Similar To:

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1 offer $32.42 USD
  • Offer #1: $32.42 price + free delivery = $32.42* total. You can also purchase sprockets that will give you more take-off speed or top-end speed. Race-Driven Rear Steel Sprocket.FREE SHIPPING