1. Antique, Vintage, Historic Motorcycle Parts For Sale
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  3. YAMAHA 90387-257A3-00

YAMAHA 90387-257A3-00 Pirmary Gear Collar Spacer

fits model: Xj, 550, Maxim. make: Yamaha. year: 1981–1983.

90387-257a3-00 Yamaha 81-83 Maxim 550 Xj Oem Pirmary Gear Collar Spacer

( Manufacturer Part Number: 90387-257A3-00 ), ( Type: Spacer )

Review YAMAHA Oem Pirmary Gear Collar Spacer fits MAXIM XJ 550 1981–1983

The **Yamaha 90387-257A3-00 Primary Gear Collar Spacer** is a precision-engineered component designed specifically for Yamaha s **Maxim 550 XJ (1981 1983)** model, ensuring optimal performance and longevity of the motorcycle s drivetrain. This high-quality spacer is crafted from durable, heat-resistant materials, engineered to maintain proper alignment and tension within the primary gear assembly. Positioned between the engine s primary drive gear and the transmission input shaft, it plays a critical role in reducing wear, minimizing vibration, and preventing premature failure of the drivetrain components. The spacer s tight tolerances and meticulous machining guarantee a secure fit, allowing for smooth power transfer from the engine to the transmission while mitigating excessive play or misalignment that could lead to mechanical stress. Whether used as an original replacement part or as part of a custom tuning project, this spacer ensures that the Maxim 550 XJ operates with the efficiency and reliability it was designed for, making it an essential component for both restoration and maintenance work. Its compatibility with the 1981 through 1983 model years ensures that riders can trust in its performance, whether they re cruising on open roads or tackling demanding rides.

### **Pros and Cons of buying a Yamaha 90387-257A3-00 (Maxim 550/XJ Primary Gear Collar Spacer)**

#### **Pros:**

1. **Compatibility with Multiple Models** This part is designed for both the Yamaha Maxim 550 and the XJ series, making it a versatile purchase if you own or plan to own either bike. This can save money if you later upgrade or need a spare.

2. **Potential Performance Benefits** A primary gear collar spacer can affect the gearing ratio, which may improve acceleration or throttle response depending on the intended use (e.g., cruising, sport riding, or track use). Some riders prefer a slightly taller gearing for better highway speeds or a shorter gearing for better low-end torque.

3. **Easy Installation** As a relatively simple component, this spacer can often be installed without extensive mechanical knowledge or specialized tools, assuming you have basic bike maintenance experience.

4. **Cost-Effective Upgrade** Compared to more complex modifications (e.g., engine tuning, exhaust upgrades), a primary gear collar spacer is a low-cost way to experiment with gearing without significant investment.

5. **Aftermarket Support** Yamaha parts like this are widely available through dealers, online retailers, and aftermarket suppliers, ensuring easy replacement if needed.

6. **Durability** Yamaha components are generally built to last, and this spacer should hold up well under normal riding conditions if installed correctly.

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#### **Cons:**

1. **Limited Direct Performance Gains** Unlike modifications that directly increase power (e.g., exhaust, air intake, or engine tuning), a gear collar spacer primarily alters gearing. The effect on real-world performance depends on how well it matches your riding style and bike setup. Some riders may not notice a significant difference.

2. **Potential for Incorrect Gearing** If you choose the wrong spacer (e.g., too tall or too short for your riding habits), it could result in:

- **Excessive revving at highway speeds** (if the gearing is too short).

- **Struggling to maintain speed or feeling sluggish** (if the gearing is too tall).

- **Straining the engine or transmission** if the bike is frequently ridden in an unsuitable gear range.

3. **No Guarantee of Improved Fuel Economy** While some riders report better fuel efficiency with optimized gearing, others may find that the change has little to no effect on mileage, especially if the bike is already tuned for efficiency.

4. **Risk of Improper Installation** If not installed correctly (e.g., improper torque, misalignment, or incorrect spacing), it could lead to drivetrain issues, such as chain or sprocket wear, or even damage to the primary drive system.

5. **Subjective Results** The perceived benefit of a gear collar spacer is highly subjective. What feels "better" to one rider may not resonate with another. Testing the change on a test ride is essential before committing to it long-term.

6. **May Not Be Necessary for Most Riders** If you re happy with your bike s stock gearing and don t experience issues like excessive revving or poor acceleration, this modification may not offer meaningful advantages.

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#### **Conclusion:**

The Yamaha 90387-257A3-00 primary gear collar spacer is a straightforward and low-risk modification that could offer subtle performance improvements for riders looking to tweak their bike s gearing. Its primary strength lies in its compatibility with multiple Yamaha models and ease of installation, making it a practical choice for those who want to experiment with gear ratios without major modifications.

However, the effectiveness of this part depends entirely on how well it aligns with your riding style and expectations. It is not a "one-size-fits-all" solution, and the results may be minimal or even undesirable if the spacer doesn t suit your needs. Before purchasing, consider whether you ve identified a specific issue with your bike s gearing (e.g., struggling to maintain speed or excessive revving) that this part could address.

If you re unsure, test-riding the bike with the spacer installed or consulting with experienced riders who have used it on similar models could provide valuable insights. Additionally, ensure you have the proper tools and confidence to install it correctly to avoid potential drivetrain issues.

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#### **Recommendation:** - **Buy it if:**

- You ve noticed your bike s gearing is either too tall (struggling at highway speeds) or too short (excessive revving).

- You re comfortable experimenting with minor modifications and have basic mechanical skills.

- You own or plan to own either a Yamaha Maxim 550 or XJ series bike, and you want a cost-effective way to adjust gearing.

- You ve researched the potential changes and are prepared to test-ride the bike afterward to confirm if the modification suits your needs.

- **Avoid it if:**

- You re satisfied with your bike s stock gearing and don t have specific complaints about acceleration or speed.

- You lack confidence in installing the part correctly or don t have access to proper tools.

- You expect dramatic performance improvements, as the changes will likely be subtle.

- You re on a tight budget and prefer to invest in more impactful modifications (e.g., exhaust, suspension, or engine tuning).

For most riders, this spacer is a low-stakes experiment worth trying if you re curious about gearing adjustments. However, prioritize testing and verification before making it a permanent change. If in doubt, consult a Yamaha dealer or a trusted mechanic for guidance.

Details:

BIN #40S, Please review all pictures to assess the condition of item. 81-83 YAMAHA MAXIM 550 XJ OEM PIRMARY GEAR COLLAR SPACER, This spacer is in very good condition and shows normal signs of wear. Removed From.

part #: 90387257a300 prices

  • $18.00-$20.00

specifications cyclevintagee:

  • for models: Xj, 550, Maxim
  • for makes: Yamaha
  • for years: 1981-1983
  • mpn: 90387-257a3-00
  • type: Spacer

general cyclevintagee:

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

returns cyclevintagee:

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

offer cyclevintagee:

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

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  • credit card: Discover

seller cyclevintagee:

  • # reviews: 7169
  • city: Spokane, Washington
  • rating: 98.9%

shipping cyclevintagee:

  • cost: $0.00
  • class: Standard
  • transit: 4-8 Days
  • service: Standard
  • type: Fixed
for models: xj, 550, maxim, for makes: yamaha, for years: 1981-1983, type: spacer,
category: motorcycle parts > motorcycle scooter parts accessories, sku: 22084079082048721,
Yamaha 90387-257A3-00 Is Similar To:
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2 offers $18.00–$20.00 USD
  • Used. Offer #1 priced at $18.00 + $0.00 shipping estimate = $18.00* total. This spacer is in very good condition and shows normal signs of wear.FREE SHIPPING
  • Used. Offer #2 priced at $20.00 + $0.00 shipping estimate = $20.00* total. FREE SHIPPING

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