fits model: Inviter. make: Yamaha. year: 1989.

( Manufacturer Part Number: 81E-23738-00-00 ), ( Type: Front Shock )
The **Yamaha 1989 Inviter SY17 Shock Housing Spacer (Part #81E-23738-00-00)** is a meticulously engineered, high-performance component designed exclusively for Yamaha s SY17 series of outboard motors, ensuring optimal suspension and vibration dampening for smooth, reliable operation. Crafted from durable, corrosion-resistant materials, this spacer serves as a critical link between the shock housing and the engine mount system, helping to absorb road shocks, reduce fatigue on the motor s internal components, and extend the lifespan of the entire drivetrain. The precision-machined design of this spacer is tailored to fit seamlessly within the 1989 model year s suspension assembly, maintaining proper alignment and clearance while minimizing unnecessary stress on the motor s housing and mounting brackets. Whether installed on a recreational boat, a fishing vessel, or a utility craft, this spacer plays a vital role in maintaining the structural integrity of the outboard s suspension system, preventing premature wear on gaskets, seals, and mounting hardware. Its inclusion in a maintenance or upgrade routine ensures that the SY17 s performance remains consistent, even under demanding conditions, while also contributing to quieter operation by mitigating vibrations that could otherwise transfer from the engine to the boat s hull. For Yamaha owners seeking to preserve the longevity and efficiency of their 1989 Inviter SY17, this spacer is an essential, often-overlooked part that bridges functionality and durability in the motor s suspension architecture.
### **Pros and Cons of buying a Yamaha 81E-23738-00-00 (1989 Inviter Shock Housing Spacer SY17)**
#### **Pros:**1. **Compatibility and Fitment** This part is specifically designed for the Yamaha Inviter (1989 model) and other compatible models, ensuring an exact fit without modifications. It is a genuine or high-quality aftermarket replacement, reducing the risk of improper installation.
2. **Improved Ride Comfort** The shock housing spacer (SY17) is intended to adjust the suspension geometry, which can enhance ride comfort by reducing harshness or bottoming out. It may also help with weight distribution, especially if the bike was modified or has worn-out shocks.
3. **Potential Performance Adjustment** Depending on the intended use (touring, off-road, or daily riding), a spacer can fine-tune the suspension s travel and damping characteristics. Some riders report better handling after installing such spacers, particularly if the original shocks were too stiff or too soft.
4. **Cost-Effective Upgrade** Compared to full shock replacements or complete suspension overhauls, a spacer is a relatively inexpensive modification. It can extend the life of existing shocks by preventing excessive compression or extension.
5. **Easy Installation** Since it is a simple spacer, installation typically requires basic tools and minimal mechanical skill. Most riders can do it themselves without professional help, saving labor costs.
6. **Genuine or High-Quality Aftermarket Part** If sourced from a reputable dealer or manufacturer, this part should be durable and compatible with the bike s suspension system. Some aftermarket spacers are designed to match OEM specifications closely.
7. **Prevents Suspension Damage** If the bike s suspension is already stretched or compressed beyond its limits, a spacer can help prevent further wear on the shocks, bushings, or other suspension components.
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#### **Cons:**1. **Limited Impact on Performance** While a spacer can make minor adjustments, it is not a comprehensive suspension upgrade. For significant improvements, a full shock tune, new springs, or rebound dampers may be needed. Expectations should remain realistic.
2. **Potential Handling Trade-Offs** Incorrect spacing (e.g., too much or too little) can negatively affect steering response, stability, or braking performance. Over-spacing may make the bike feel sluggish or unstable, while under-spacing could lead to bottoming out.
3. **Compatibility Risks** If the part is not genuine Yamaha or from a trusted aftermarket brand, there is a chance of poor quality, incorrect dimensions, or material failure. Always verify the part number and source before purchasing.
4. **May Void Warranty (If Applicable)** If the bike is still under warranty, installing aftermarket suspension parts (even spacers) could void coverage, especially if the dealer considers it a modification.
5. **Requires Proper Installation** Improper installation (e.g., misalignment, incorrect torque) can lead to suspension binding, uneven wear, or even damage to the shocks or frame. Follow the manufacturer s instructions carefully.
6. **Not a Permanent Fix** If the underlying issue is worn shocks, misaligned geometry, or a damaged frame, a spacer alone will not resolve it. It may provide temporary relief but could exacerbate problems if the root cause is ignored.
7. **Limited Availability of Information** Since the Yamaha Inviter is an older model, detailed tuning guides or community feedback on this specific part may be scarce. Researching user experiences from similar bikes (e.g., Yamaha XJ6, XJ6S, or other Inviter variants) can help, but results may vary.
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### **Conclusion:**The Yamaha 81E-23738-00-00 (1989 Inviter shock housing spacer SY17) is a practical and relatively low-risk modification for riders looking to fine-tune their suspension. It offers a simple way to adjust ride comfort and handling without a major overhaul. However, it is not a cure-all and should be viewed as a supplementary adjustment rather than a full suspension upgrade.
The decision to purchase depends on your specific needs:- If your bike feels too stiff, bottoms out frequently, or has worn shocks, a spacer could help.
- If you re unsure about suspension tuning, consult a mechanic or experienced rider before installing it.
- Always prioritize quality and compatibility to avoid issues down the line.
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### **Recommendation:**1. **Verify Compatibility** Double-check that this part is indeed for your exact model (1989 Yamaha Inviter) and that it matches your suspension setup (e.g., preload, travel length). Some Inviter models may have variations in shock mounting.
2. **Source from a Trusted Supplier** Purchase from a Yamaha-approved dealer, a reputable aftermarket parts store, or a seller with verified reviews. Avoid counterfeit or poorly made spacers that could damage your bike.
3. **Research User Experiences** Look for forums (e.g., Yamaha Owners Club, Cycle World, or niche motorcycle tuning groups) where owners of similar bikes discuss their results with this spacer. Pay attention to both positive and negative feedback.
4. **Consider Professional Installation** If you re not confident in your mechanical skills, have a trusted mechanic install it to ensure proper alignment and torque specifications.
5. **Test Ride After Installation** After installing the spacer, take the bike for a test ride to assess changes in handling, comfort, and stability. Adjust as needed, and be prepared to reverse the modification if it worsens performance.
6. **Combine with Other Adjustments** If you re dissatisfied with the results, consider pairing this spacer with other suspension tweaks (e.g., new springs, shock valving adjustments) for a more comprehensive upgrade.
7. **Document the Modification** Keep records of the installation (photos, notes) in case you need to revert to the original setup or troubleshoot future issues.
**Final Verdict:** If you re looking for a modest, low-cost way to improve your Yamaha Inviter s suspension feel and prevent minor issues, this spacer is a worthwhile addition provided you source it correctly and approach the modification with realistic expectations. For significant performance gains, however, a full suspension tune may be necessary.
Removed From: 1989 Yamaha Inviter with miles. 1989 Yamaha Inviter Oem Shock Housing Spacer 81E-23738-00-00 SY17. Change your mind, don't need the part, or just wan't what you are looking for.: This spacer is in very good condition and shows normal signs of wear.