YAMAHA 371-83509-71 Wire Harness Tachometer Speedometer Gauge

( Manufacturer Part Number: 371-83509-71 ), ( Part Type: Wire ), ( Country Of Origin: Japan )

Review YAMAHA Wire Harness Works Tachometer Speedometer Gauge fits TX650 XS650 1974–1975

The **Yamaha 371-83509-71 1974 TX650 and 1975 XS650 Wire Harness with Tachometer, Speedometer, and Gauge Assembly** is a meticulously crafted, high-quality replacement component designed to restore the functionality and authenticity of your classic Yamaha adventure bike. This genuine OEM-style harness is engineered to seamlessly integrate with the electrical system of the TX650 and XS650 models, ensuring precise readings from the tachometer, speedometer, and gauge cluster while maintaining the original wiring integrity. Crafted from durable, corrosion-resistant materials, the harness features meticulously routed wires and secure crimped connectors, guaranteeing reliable performance even under the demanding conditions of long-distance touring or off-road excursions. The tachometer wire is carefully insulated to prevent interference, while the speedometer wiring ensures accurate mileage tracking, essential for both maintenance scheduling and enthusiast tracking of your bike s journey. This harness is not merely a functional upgrade but a nod to Yamaha s engineering precision from the 1970s, offering a perfect blend of vintage authenticity and modern reliability. Whether you're restoring a showroom-worthy classic or simply upgrading an aging adventure bike, this harness delivers the performance and durability expected from Yamaha s legendary motorcycles.

### **Pros and Cons of buying a Yamaha 1974 TX650 / 1975 XS650 Wire Harness, Tachometer, and Speedometer Gauge (Part #371-83509-71)**

#### **Pros**

1. **Authentic Fit and Function** This is an original Yamaha part designed specifically for the TX650 (1974 1976) and XS650 (1975 1976) models. It ensures proper compatibility with wiring, connectors, and mounting points, reducing the risk of installation issues.

2. **Reliable Performance** Yamaha s gauges and wiring harnesses from this era were built to last, especially if the part is in good condition. The tachometer and speedometer were known for their durability, and a well-maintained harness ensures stable electrical connections.

3. **Aesthetic and Historical Value** For enthusiasts restoring or maintaining a classic Yamaha, using original or OEM-replica parts preserves the bike s authenticity. This can be particularly appealing for collectors or those who prioritize period-correct builds.

4. **Easier Maintenance** Since these parts were designed for the bike, troubleshooting electrical issues (e.g., flickering gauges, dead tachometer) may be simpler compared to aftermarket alternatives that might require additional adapters or modifications.

5. **Potential for Increased Bike Value** If you plan to sell or trade the bike later, having original or high-quality replica parts can enhance its appeal to collectors and purists.

6. **Compatibility with Other Classic Yamaha Parts** The wiring and gauge setup integrates seamlessly with other OEM components (e.g., original meters, switches, or aftermarket gauges that use the same mounting pattern).

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#### **Cons**

1. **Age-Related Wear and Potential Issues**

- The harness may show signs of aging, such as brittle wiring, corroded connectors, or cracked insulation. If not properly inspected, this could lead to intermittent electrical problems.

- The tachometer and speedometer may have worn gears, faulty needles, or damaged dials, especially if the part has been stored for decades.

2. **Limited Availability and Condition Variability**

- Finding a fully functional unit in good condition can be challenging, as these parts are no longer mass-produced. You may need to search through auctions, junkyards, or specialty shops, which could drive up the price if the part is rare.

- The condition of the part may not be transparent until purchase, especially if buying from a private seller.

3. **Higher Cost Relative to Aftermarket Alternatives**

- While not excessively expensive, OEM-replica parts for classic bikes can be pricier than modern aftermarket gauges or harnesses. For example, a complete set of aftermarket gauges (e.g., from Speedhawk or Apex) might offer similar functionality at a lower cost.

- Shipping or import fees could apply if the part is sourced from overseas.

4. **Potential for Incompatibility with Modifications**

- If the bike has been heavily modified (e.g., custom wiring, aftermarket ECU, or non-standard lighting), the original harness may not integrate cleanly. You might need to adapt or replace sections of it.

- Some aftermarket gauges or tachometers use different mounting patterns or wiring schemes, requiring additional work to integrate the original parts.

5. **Testing and Verification Required**

- Before installing, you ll need to test the tachometer (e.g., with a known RPM source) and speedometer (e.g., by rolling the bike) to ensure accuracy. If they re off-calibrated, adjustments may be necessary.

- The harness should be inspected for continuity, especially if the bike has been stored for long periods (e.g., in a garage with moisture).

6. **Limited Support and Warranty**

- Unlike new aftermarket parts, there s no warranty or customer support for OEM-replica components. If the part fails shortly after purchase, you ll be responsible for repairs or replacements.

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### **Conclusion**

- You prioritize **authenticity** and want to maintain the bike s original character.

- You re restoring a **TX650 or XS650** and need a **direct replacement** for missing or damaged parts.

- You re comfortable with **basic electrical testing** and don t mind potentially dealing with age-related wear.

- You re willing to **pay a premium** for OEM compatibility over aftermarket alternatives.

- You re looking for **modern reliability** or **easy availability** (aftermarket gauges may be more practical).

- The bike has **significant modifications** that conflict with the original wiring setup.

- You re on a **tight budget** and can find a functional aftermarket equivalent at a lower cost.

- You lack the **time or expertise** to thoroughly inspect and test the part before installation.

---

### **Recommendation**

1. **Inspect Thoroughly Before Purchase**

- If possible, **test the tachometer** (e.g., by spinning the bike s engine or using a known RPM source) and **check the speedometer needle** for smooth operation.

- Look for **signs of corrosion, cracked wiring, or loose connectors** in the harness. A multimeter can help verify continuity.

- Ask the seller for **clear photos** of the part in use (not just packaging) and, if possible, a **test video** of the gauges working.

2. **Compare with Aftermarket Options**

- If budget allows, consider **aftermarket gauges** (e.g., Speedhawk, Apex, or Vintage Cycle) that offer similar functionality with modern reliability. Brands like **Vintage Cycle** also produce **OEM-replica gauges** that may be easier to source.

- For the harness, a **custom-wired solution** (e.g., from a classic bike electrician) could be more durable than an aged original.

3. **Budget for Additional Work**

- If the part is in poor condition, factor in costs for **cleaning connectors, replacing worn wiring, or recalibrating gauges**.

- If the bike s electrical system is outdated, you might need to **upgrade other components** (e.g., fuse block, switches) to ensure compatibility.

4. **Prioritize Condition Over Price**

- A **slightly more expensive but fully functional unit** is better than a cheap one that fails shortly after installation. Be wary of "too good to be true" deals that may hide underlying issues.

5. **Consider a Partial Replacement**

- If only one gauge (e.g., tachometer) is faulty, you might **source that individually** rather than buying the entire harness and gauge set.

For a **true classic bike enthusiast** restoring a TX650 or XS650 to factory spec, this part is a **solid investment** if sourced carefully. For those seeking **modern convenience or cost efficiency**, aftermarket alternatives may be preferable. Always **test before committing** to avoid post-purchase headaches.

Details:

Otherwise in good working condition. Four of the bulb holders are torn as shown in last two pictures. I ship fast and pack carefully. All circuits and bulbs are good.

Gauges mount mounts dash board dashboard tachometer Good used Yamaha gauge cluster WIRE HARNESS for 1974 TX500 and 1975 XS500. Has all of the bulb sockets for tachometer, speedometer, and indicator bracket.

part #: 3718350971 price

• $74.95

specifications speedometercycleiz:

• for models: Tx650, Xs650
• for makes: Yamaha
• for years: 1974-1975
• mpn: 371-83509-71
• part type: Wire
• country of origin: Japan

shipping speedometercycleiz:

• transit: 3-9 Days
• cost: $7.49
• service: Standard
• type: Fixed
• class: Standard

general speedometercycleiz:

• condition: Used
• Motorcycle Scooter Parts Accessories > Instruments Gauges > Individual Gauges

seller speedometercycleiz:

• city: Austin, Texas
• # reviews: 6002
• rating: 100.0%

offer speedometercycleiz:

• sold: 0
• options: Ship-to-home
• started: March 17, 2026
• quantity: 1
• availability: In Stock

returns speedometercycleiz:

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

payments speedometercycleiz:

• credit card: Visa
• wallet: Paypal
• other

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