fits model: 1600, Road, Star. make: Yamaha. year: 1999–2003.

( Manufacturer Part Number: 7813623 ), ( Placement On Vehicle: Rear ), ( Type: Airbox ), ( Compatible Year: 1999, 2000, 2001, 2002, 2003 )
The **Yamaha 7813623 Rear Axle Spacers** for the **1999 2003 Road Star 1600** are a precision-engineered aftermarket upgrade designed to enhance the handling, stability, and overall ride quality of this iconic cruiser. Crafted from high-grade, durable materials, these spacers are meticulously machined to fit seamlessly between the rear axle and the swingarm, providing a subtle yet effective adjustment to the bike s geometry. By increasing the wheelbase incrementally, these spacers help reduce rear-end squat under hard acceleration, improve traction during cornering, and minimize the tendency for the bike to dip or bottom out when braking. This subtle modification also promotes a more upright riding position, reducing fatigue on long rides and offering a more composed feel at highway speeds. Ideal for riders seeking a refined, sportier handling characteristic without sacrificing the Road Star s classic cruiser aesthetics, these spacers are a straightforward yet impactful solution for those looking to fine-tune their bike s performance. Compatible exclusively with the 1600cc model in the specified production years, they are a trusted choice among enthusiasts aiming to optimize their Road Star s balance, responsiveness, and overall ride dynamics.
**Pros and Cons of Buying Yamaha 7813623 Rear Axle Spacers for a 1999 2003 Road Star 1600**
### **Pros:**1. **Improved Ride Comfort and Stability** Axle spacers increase wheelbase length, which can reduce body roll and improve handling, especially at higher speeds or when carrying heavier loads. This is particularly useful for touring bikes where stability is critical.
2. **Better Weight Distribution** By extending the wheelbase, spacers help balance the weight of the engine and rear suspension more evenly, potentially reducing front-end dive during braking and improving overall balance.
3. **Compatibility with Aftermarket Modifications** If you plan to add a larger front tire, a longer wheelbase can help prevent rubbing or clearance issues, especially with wider or taller tires.
4. **Potential for Reduced Rear Suspension Stress** A longer wheelbase may reduce the strain on the rear suspension, particularly if the bike is heavily loaded or ridden aggressively.
5. **Easy Installation** These spacers are designed to be a straightforward bolt-on modification, requiring minimal tools and expertise. Most riders can install them without professional help.
6. **Cost-Effective Upgrade** Compared to full suspension or frame modifications, axle spacers are relatively inexpensive, offering noticeable benefits without a major investment.
7. **Potential for Improved Ergonomics** Some riders report a slight shift in handling dynamics that can make the bike feel more planted, which may reduce fatigue on long rides.
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### **Cons:**1. **Potential for Increased Rear Tire Wear** A longer wheelbase can cause the rear tire to wear unevenly, particularly if the bike is ridden aggressively or on rough terrain. This may require more frequent tire replacements.
2. **Possible Handling Changes** While some riders appreciate the stability, others may find the bike feels less nimble or responsive, especially in tight corners or at low speeds. The change in handling dynamics can take adjustment.
3. **Compatibility with Stock Components** If the bike has stock rear suspension or swingarm components, the spacers may require slight adjustments to chainline or alignment. This could necessitate minor modifications to the chain or derailleur.
4. **Limited Impact on Performance** Axle spacers do not significantly improve acceleration, braking, or top speed. Their benefits are primarily in comfort and stability rather than raw performance.
5. **Risk of Improper Installation** If not installed correctly, spacers can cause misalignment, leading to premature wear on bearings, wheels, or suspension components. Ensuring proper torque and alignment is crucial.
6. **Potential for Reduced Rear Shock Efficiency** In some cases, a longer wheelbase may slightly alter the suspension geometry, though this is usually minor and rarely a major issue.
7. **Not a Universal Fix for Handling Issues** If the bike s handling problems stem from suspension tuning, tire pressure, or other factors, spacers may not resolve them. They are a symptomatic rather than a root-cause solution.
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### **Conclusion:**Yamaha 7813623 rear axle spacers for the 1999 2003 Road Star 1600 are a worthwhile modification for riders seeking improved stability, reduced body roll, and better weight distribution particularly those who prioritize comfort and touring capabilities. The benefits are most noticeable on long rides or when carrying additional weight. However, the trade-offs, such as potential handling changes and rear tire wear, should be carefully considered.
If you frequently ride at high speeds, carry heavy loads, or experience front-end dive, the spacers are likely a positive upgrade. Conversely, if you prefer a more agile, sporty feel or have specific handling concerns, the modification may not be ideal.
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### **Recommendation:** **Install the spacers if:**- You primarily use the bike for touring or long-distance riding.
- You notice excessive body roll or instability at higher speeds.
- You plan to add larger or wider tires and want to avoid clearance issues.
- You are comfortable with a slight shift in handling dynamics for improved comfort.
**Avoid or reconsider if:**- You prioritize agility and quick handling over stability.
- You ride mostly in urban or technical terrain where responsiveness is critical.
- You are unsure about adjusting the chainline or suspension alignment post-installation.
- Your bike s handling issues stem from other factors (e.g., suspension tuning, tire pressure).
**Additional Tips:**- Measure your current wheelbase and compare it to the new configuration to ensure the change aligns with your riding style.
- Consider pairing the spacers with a rear shock adjustment or tire pressure tweaks to optimize the new handling characteristics.
- If unsure, consult with a Yamaha specialist or experienced mechanic to confirm compatibility and installation best practices.
Condition: This is a used part and may show signs of normal wear. It may require cleaning before installation. Used carburetors may need cleaning or a rebuild before use. Used cylinders may require honing or boring.