YAMAHA 371-17421-00-00 Engine Motor Transmission Gears 73-74

( Type: Transmission ), ( Country Of Origin: Japan ), ( UPC: 371174210000 )

Review YAMAHA 73-74 Oem Engine Motor Transmission Tranny Gears fits TX500

The **Yamaha 371-17421-00-00 (73-74 TX500 Engine Motor Transmission Gears)** is a meticulously engineered, high-performance component designed exclusively for Yamaha s legendary **TX500 motorcycle**, produced during the model years **1973 and 1974**. This transmission assembly represents the heart of the bike s drivetrain, combining precision-crafted gears, a robust transmission housing, and a durable clutch mechanism to deliver the raw, responsive power that defined the TX500 s reputation as a high-octane, street-legal racer. The gearset is built to withstand the intense demands of aggressive riding, featuring a **five-speed sequential transmission** with a tight, progressive ratio that allows for lightning-fast shifts and optimal torque delivery across the engine s rev range. The primary gear cluster is machined from high-grade alloy steel, ensuring minimal wear and maximum durability even under extreme loads, while the countershaft gears are precision-balanced to reduce vibration and enhance smoothness during acceleration. This transmission is not merely a functional component but a testament to Yamaha s engineering prowess of the era, blending Japanese craftsmanship with the aggressive spirit of the TX500 s racing heritage. Whether restoring a classic bike to its original glory or upgrading an existing TX500, this genuine OEM gearset ensures seamless performance, authentic handling, and the unmistakable growl of a properly tuned 499cc air-cooled twin. Its compatibility with the **TX500 s 73-74 engine motor** makes it an essential part for enthusiasts seeking to preserve or revive the raw, unfiltered power of one of Yamaha s most iconic streetfighters.

### **Pros and Cons of Buying a Used Yamaha 371-17421-00-00 (73-74 TX500 Engine, Motor, Transmission, Gears)**

1. **Classic and Reliable Design** The Yamaha TX500 (1973 1974) is a well-regarded off-road motorcycle known for its durability and off-road capabilities. It was designed for rugged use, making it a favorite among enthusiasts who appreciate vintage engineering.

2. **Strong Engine Performance** The 499cc air-cooled single-cylinder engine (with a 73-74 model variant) is robust and capable of handling rough terrain. With proper maintenance, it can still deliver solid power for light trail riding or track use.

3. **Mechanical Simplicity** The TX500 features a straightforward drivetrain (chain final drive, manual transmission) that is easier to repair and maintain compared to modern complex systems. Many mechanics are familiar with its components.

4. **Off-Road Heritage** If you appreciate classic off-road bikes, the TX500 is a nostalgic choice. Its design influences later Yamaha models like the XT600 and XT500, making it a piece of motorcycle history.

5. **Potential for Restoration** If you enjoy working on bikes, the TX500 can be a rewarding project. Many parts are still available, and restoring one can be a fulfilling hobby.

6. **Lower Cost Compared to Modern Bikes** Since it s an older model, the upfront cost is significantly lower than buying a new or even a newer used bike. This makes it an attractive option for budget-conscious buyers.

7. **Community and Customization** There is a dedicated community of TX500 owners who share knowledge, parts, and modifications. This can be helpful for troubleshooting and enhancing the bike s performance.

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1. **Age and Wear** A 1973 1974 TX500 will likely have significant mileage and wear, especially if it has not been well-maintained. Key components like the engine, transmission, and suspension may require replacement or extensive work.

2. **Reliability Concerns** Older engines, especially air-cooled singles, are prone to issues like piston wear, valve problems, or bearing failure if not properly maintained. The transmission and gears may also be worn out.

3. **Limited Modern Parts Availability** While some parts are still available, others (especially rare or discontinued items) can be difficult to source. You may need to rely on aftermarket or vintage suppliers.

4. **Safety and Modern Standards** The TX500 lacks modern safety features such as ABS, traction control, or advanced suspension systems. Its braking and handling may not meet today s safety expectations, especially for high-speed or highway use.

5. **Fuel and Emissions Issues** Older bikes like the TX500 do not meet modern emissions standards, which could limit where you can ride or require modifications to pass inspections in some areas.

6. **Maintenance Costs** While parts may be cheap, labor costs for specialized work (e.g., rebuilding the engine or transmission) can add up. You may need to invest time or money in professional repairs.

7. **Resale Value** Unlike newer bikes, the TX500 has little to no resale value. If you decide to sell it later, you may not recover much of your investment.

8. **Riding Experience** The bike s ergonomics and comfort may not suit modern riders. The seating position, suspension, and overall handling are designed for off-road use, which may not be ideal for daily commuting or highway riding.

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Buying a used Yamaha 371-17421-00-00 (73-74 TX500 engine, motor, transmission, and gears) can be a great choice if you are looking for a classic off-road bike, enjoy working on projects, or appreciate vintage motorcycle engineering. The bike offers a unique riding experience and a strong following among enthusiasts. However, it comes with significant drawbacks, particularly in terms of reliability, maintenance costs, and the need for extensive work to bring it back to a rideable condition.

If you are mechanically inclined and willing to invest time and effort into restoring or maintaining the bike, it can be a rewarding purchase. On the other hand, if you prioritize reliability, modern safety features, or ease of use, a newer or more modern used bike may be a better investment.

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- **Buy if:** You are an experienced rider or mechanic, enjoy restoring classic bikes, and are willing to put in the work to make it road-legal and reliable. You also appreciate the bike s off-road heritage and are okay with its limitations.

- **Avoid if:** You want a bike that is ready to ride out of the box with minimal maintenance, prioritize modern safety features, or plan to use it for frequent highway or daily commuting. In this case, consider a newer used bike with a proven track record, such as a Yamaha XT600, Honda XL600R, or a modern adventure bike.

Before purchasing, thoroughly inspect the engine, transmission, suspension, and frame. Have a mechanic experienced with vintage bikes evaluate it to assess the extent of repairs needed. Additionally, factor in the cost of parts, labor, and potential modifications to ensure the bike meets your riding needs and budget.

Details:

Removed From NA. BIN #42F, Please review all pictures to assess the condition of item. 73-74 YAMAHA TX500 OEM ENGINE MOTOR TRANSMISSION TRANNY GEARS, This transmission is in very good condition and shows normal signs of wear.

part #: 371174210000 prices

• $49.00-$72.24

specifications transmissioncycleoi:

• for models: Tx500
• for makes: Yamaha
• type: Transmission
• country of origin: Japan
• upc: 371174210000

payments transmissioncycleoi:

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

returns transmissioncycleoi:

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

seller transmissioncycleoi:

• rating: 99.1%
• city: Spokane, Washington
• # reviews: 7480

shipping transmissioncycleoi:

• type: Calculated
• service: FedEx Ground / FedEx Home Delivery
• transit: 3-8 Days
• cost: $25.11
• carrier: FedEx
• class: Standard

offer transmissioncycleoi:

• sold: 0
• started: June 9, 2026
• quantity: 1
• best offers: True
• availability: In Stock
• options: Ship-to-home

general transmissioncycleoi:

• condition: Used
• Motorcycle Scooter Parts Accessories > Transmission Drivetrain > Other Transmission Drivetrain Parts

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