YAMAHA 90508-90409-00 Rear Torsion Spring 90508-90409. Spring.

( Part Type: Spring ), ( UPC: 905089040900 )

Review YAMAHA 90508-90409. Oem Rear Torsion Spring. fits SR540 1980

The **Yamaha 90508-90409-00 Rear Torsion Spring (SR540/80)** is a precision-engineered component designed exclusively for Yamaha s SR540 and SR80 scooters, ensuring optimal ride stability, suspension performance, and long-term durability. Crafted from high-grade, heat-treated steel, this torsion spring is built to withstand the demands of daily commuting, urban maneuvering, and varied road conditions while maintaining consistent tension and responsiveness. The spring s robust construction minimizes fatigue and deformation over time, reducing the risk of premature failure and maintaining a smooth, controlled suspension action. Its precise calibration is tailored to Yamaha s suspension system, allowing for proper wheel travel, damping efficiency, and a balanced weight distribution between the front and rear wheels. Whether navigating tight city streets, handling sudden stops, or absorbing minor bumps, this torsion spring delivers reliable performance, contributing to a more comfortable and controlled riding experience. Ideal for both original equipment replacement and performance upgrades, this part adheres to Yamaha s strict engineering standards, ensuring seamless compatibility with the scooter s frame and suspension assembly. Its durable finish resists corrosion, making it well-suited for riders in diverse climates, from humid coastal areas to dry, dusty environments. By maintaining the integrity of the rear suspension, this torsion spring helps preserve the scooter s handling precision, braking efficiency, and overall ride quality, making it an essential component for anyone seeking to restore or enhance their Yamaha SR540 or SR80 s performance.

### Yamaha SR540 Rear Torsion Spring (Part Numbers: 90508-90409-00 and 90508-90409)

1. **Authentic OEM Replacement** These parts are genuine Yamaha components, ensuring a perfect fit and compatibility with the SR540. OEM parts are designed to meet the manufacturer s specifications, reducing the risk of premature failure or poor performance.

2. **Reliability and Durability** Yamaha s engineering ensures that these springs are built to last, maintaining the suspension s intended performance and handling characteristics. High-quality materials resist wear and fatigue over time.

3. **Safety** Using original equipment parts minimizes the risk of suspension failure, which could lead to handling issues or accidents. This is particularly important for riders who prioritize safety and stability.

4. **Warranty Coverage** Purchasing from an authorized dealer or Yamaha-approved seller often includes warranty protection, providing peace of mind against defects or premature wear.

5. **Maintenance of Resale Value** Keeping the bike in top condition with genuine parts helps maintain its resale value, especially if you plan to sell the SR540 in the future.

6. **Consistency with Factory Setup** The SR540 s suspension tuning is finely balanced for its intended use (e.g., touring or cruising). Replacing with OEM parts ensures the bike retains its original handling characteristics without unintended modifications.

7. **Ease of Installation** Since these are standard parts, they are designed to be installed without requiring extensive modifications or specialized tools, making maintenance simpler for DIYers.

8. **Support for Original Performance** The torsion springs contribute to the SR540 s smooth ride and comfort. Replacing worn springs restores the suspension s intended performance, reducing harshness or sagging.

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1. **Higher Cost** Genuine Yamaha parts are more expensive than aftermarket alternatives. For budget-conscious buyers, this may be a significant drawback, especially if multiple suspension components need replacement.

2. **Limited Availability** Depending on the region, these parts may not be readily available at local dealers, requiring online purchases or shipping delays. Some Yamaha models, including the SR540, are no longer in production, which can complicate part sourcing.

3. **Potential for Overkill** If the suspension issues are minor (e.g., slight sagging or minor stiffness), replacing just the torsion springs may not fully address the problem. Other components (e.g., shock absorbers, linkages, or bushings) might also need attention for a complete fix.

4. **Time-Consuming Installation** While not overly complex, replacing torsion springs requires careful adjustment to ensure proper sag and preload. Riders unfamiliar with suspension tuning may need to consult a mechanic, adding labor costs.

5. **Environmental and Ethical Considerations** Purchasing new parts contributes to waste if the existing parts are still functional. Some buyers may prefer refurbished or salvaged parts to reduce environmental impact, though this risks compatibility issues.

6. **No Performance Upgrades** Unlike aftermarket springs, these are not designed for aggressive tuning (e.g., lowering or stiffening the suspension for track use). Riders seeking performance modifications will need to look elsewhere.

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Buying the genuine Yamaha rear torsion springs (90508-90409-00 and 90508-90409) for your SR540 is a pragmatic choice if you prioritize reliability, safety, and maintaining the bike s original specifications. The pros such as authenticity, durability, and warranty support outweigh the cons for most riders who value long-term performance and resale value. However, if budget constraints or minor suspension issues are the primary concern, aftermarket alternatives (e.g., high-quality replicas or refurbished parts) might be worth considering after thorough research.

For the average SR540 owner who wants to restore or maintain the suspension to factory standards, these OEM springs are the best option. They ensure the bike s handling remains true to Yamaha s design intent, which is particularly valuable for riders who use the bike for touring, daily commuting, or casual riding where comfort and safety are paramount.

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- You notice significant sagging, stiffness, or poor handling in the rear suspension.

- You want to restore the SR540 to its original condition for resale or long-term use.

- You prefer the peace of mind that comes with OEM parts and warranty coverage.

- You re willing to invest in genuine components to avoid potential compatibility or performance issues.

- You re on a tight budget and can find high-quality aftermarket springs (e.g., from reputable brands like Progressive or YSS) that fit the SR540.

- The suspension issues are isolated (e.g., only the springs are worn), and you re confident in diagnosing the problem.

- You re comfortable with DIY maintenance and can source parts from trusted sellers (e.g., eBay, Yamaha dealers, or suspension specialists).

**Final Note:** Always inspect the existing springs for wear or damage before purchasing replacements. If the suspension linkages, bushings, or shocks are also degraded, address those components simultaneously for a complete solution. For complex issues, consulting a Yamaha-certified mechanic can prevent costly mistakes.

Details:

Please research part number for specifications to ensure this will work your vehicles make, model and year. Some NOS parts show normal shelf wear from age. Years and model's stated are given as a range may or not include all years within. OEM Rear Torsion Spring.

Yamaha 90508-90409. Feel free to ask questions. Fits Yamaha SR540 80.

part #: 905089040900 prices

• $13.25-$14.92

specifications snowmobileshocksoi:

• for models: Sr540
• for makes: Yamaha
• for years: 1980
• part type: Spring
• upc: 905089040900

returns snowmobileshocksoi:

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

offer snowmobileshocksoi:

• availability: In Stock
• options: Ship-to-home
• quantity: 1
• sold: 0
• started: June 8, 2026

seller snowmobileshocksoi:

• city: Townsend,
• rating: 99.9%
• # reviews: 54220

shipping snowmobileshocksoi:

• cost: $11.35
• service: USPS Ground Advantage
• carrier: USPS
• transit: 4-10 Days
• class: Standard
• type: Calculated

payments snowmobileshocksoi:

• wallet: Paypal
• other
• credit card: Discover

general snowmobileshocksoi:

• Parts Accessories > Snowmobile Parts > Shocks Suspension
• condition: New other see details

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