YAMAHA 821-84712-00 Nos Taillight Lens Gasket SL338

( Manufacturer Part Number: 821-84712-00 ), ( Part Type: Taillight Gasket Len ), ( Country Of Origin: United States ), ( Manufacturer Warranty: Unspecified Length ), ( Storage Location: E1 Karl7-n Buk 1 Bin 6 )

Review YAMAHA Nos Taillight Lens Gasket fits SL292 1970–1972

The **Yamaha SL292 and SL338 1970 1972 Tailight Lens Gasket (Part Number: 821-84712-00)** is a meticulously engineered, high-quality replacement component designed to restore both the functionality and aesthetic integrity of your classic Yamaha motorcycle s taillight assembly. Crafted from durable, weather-resistant materials, this gasket serves as a critical seal between the lens housing and the tail light unit, preventing moisture, dust, and road debris from infiltrating the internal wiring and electrical connections thereby safeguarding against potential short circuits, corrosion, or premature failure. The gasket s precise fit ensures a snug, uniform seal around the perimeter of the lens, maintaining optimal light dispersion while minimizing light leakage that could compromise visibility or draw unwanted attention. Ideal for restorers, customizers, and enthusiasts seeking to preserve the original factory look of their SL292 or SL338, this part is a direct OEM replacement, guaranteeing compatibility with the stock mounting and alignment points. Whether you re tackling a full rebuild, addressing a leaky taillight housing, or simply upgrading your bike s appearance, this gasket is an essential component for maintaining both performance and curb appeal. Its straightforward installation requiring only a bit of adhesive or silicone sealant for added security makes it a hassle-free solution for even those with limited mechanical experience. By investing in this genuine Yamaha part, you re not only ensuring long-term reliability but also upholding the legacy of your motorcycle s original design intent.

Buying a set of aftermarket taillight lenses and gaskets for a 1970-1972 Yamaha SL292/SL338 (specifically part numbers like Yamaha 821-84712-00 or equivalent aftermarket replacements) can be a practical solution for restoring or upgrading your motorcycle s lighting. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of Buying Aftermarket Taillight Lenses and Gaskets**

1. **Improved Visibility and Clarity**

Aftermarket lenses are often made from high-quality polycarbonate or acrylic materials, which can provide better light diffusion and clarity compared to aging original lenses. This can enhance visibility for other road users, especially in low-light conditions.

2. **Better Durability and Weather Resistance**

Original lenses from the early 1970s may become brittle, cracked, or yellowed over time due to UV exposure and age. Aftermarket lenses are typically designed to resist cracking, fogging, and fading, extending the lifespan of your taillight assembly.

3. **Easier Installation and Replacement**

Aftermarket parts are often designed with modern manufacturing standards, making them easier to install than worn-out original components. Gaskets, in particular, are usually pre-cut to fit perfectly, reducing the risk of leaks or misalignment.

4. **Cost-Effective Upgrade**

Replacing just the lenses and gaskets is significantly cheaper than buying a complete aftermarket taillight unit. This is a budget-friendly way to restore functionality without a full overhaul.

5. **Compatibility with Modifications**

If you ve already upgraded other components (e.g., LED bulbs, wiring harnesses), aftermarket lenses ensure a seamless fit without requiring additional modifications. They can also accommodate modern bulb types (e.g., LED or halogen) better than original lenses.

6. **Aesthetic Restoration**

Original lenses may appear cloudy or discolored, detracting from the motorcycle s vintage appearance. Aftermarket lenses often come in clear or restored finishes, improving the bike s overall look.

7. **Accessibility of Parts**

While Yamaha original parts may be hard to find, aftermarket suppliers (e.g., Speedhawk, Cycle Gear, or eBay sellers specializing in Yamaha parts) stock these components reliably. This reduces the risk of long waits or counterfeit parts.

8. **Potential for Customization**

Some aftermarket lenses offer design variations (e.g., clear, smoked, or colored) or additional features like integrated reflectors, allowing for a personalized touch.

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### **Cons of Buying Aftermarket Taillight Lenses and Gaskets**

1. **Quality Variability**

Not all aftermarket parts are created equal. Lower-quality lenses may still yellow over time, crack under heat, or have poor light diffusion. Researching reputable suppliers (e.g., Speedhawk, Cycle Gear, or trusted eBay sellers) is crucial to avoid subpar products.

2. **Fitment Issues**

While most aftermarket lenses are designed to fit Yamaha SL292/SL338 models, slight variations in mounting holes or gasket sizes can occur. Some lenses may require trimming or additional sealant to prevent leaks. Always check reviews or consult the seller for fitment confirmation.

3. **Compatibility with Original Wiring/Harness**

If your taillight s wiring harness is damaged or incompatible with modern bulbs (e.g., LEDs), simply replacing the lens may not solve the issue. You might need to upgrade the entire harness or bulbs separately, adding to the cost.

4. **Potential for Counterfeit Parts**

Buying from untrusted sellers (especially on platforms like AliExpress or unverified eBay stores) risks receiving counterfeit or poorly made parts. These may fail quickly, void warranties, or not meet safety standards.

5. **Limited Longevity of Gaskets**

While aftermarket gaskets are an improvement over worn-out originals, they may still degrade over time, especially if exposed to heat or chemicals (e.g., brake fluid leaks). Regular inspection and replacement are recommended.

6. **No Guarantee of Original Functionality**

If the taillight s internal components (e.g., reflector, wiring) are faulty, replacing just the lens and gasket won t restore full functionality. A thorough inspection of the entire unit may be necessary.

7. **Potential for Overkill**

If your primary goal is basic functionality and you re not planning further modifications, investing in aftermarket lenses might feel unnecessary. Original lenses (if still functional) could suffice for a minimalist restoration.

8. **Installation Challenges**

Removing the old lens and gasket may require careful disassembly, especially if the taillight is mounted securely. Improper handling could damage the surrounding components or the motorcycle s bodywork.

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### **Conclusion**

Buying aftermarket taillight lenses and gaskets for your 1970-1972 Yamaha SL292/SL338 is a pragmatic choice if your original lenses are cracked, yellowed, or leaking. The benefits improved visibility, durability, and ease of installation outweigh the drawbacks for most riders, provided you source high-quality parts from reputable suppliers. However, if your taillight s internal wiring or reflector is compromised, addressing those issues simultaneously will ensure long-term reliability.

1. **Verify compatibility**: Confirm that the aftermarket lenses (e.g., Speedhawk or Cycle Gear) are explicitly listed for SL292/SL338 models. Check for user reviews on fitment.

2. **Inspect the taillight assembly**: Before purchasing, test the existing taillight s functionality. If the bulb or wiring is faulty, address those issues first.

3. **Choose trusted suppliers**: Prioritize sellers with positive feedback, clear product descriptions, and return policies. Avoid overly cheap listings that may indicate counterfeit or low-quality parts.

4. **Consider a full upgrade if needed**: If your taillight is beyond repair, evaluate whether an aftermarket taillight unit (e.g., Speedhawk or Yamaha OEM replacement) is worth the investment for complete reliability.

5. **Maintain the new parts**: Use silicone-based sealants sparingly on gaskets and avoid exposing the lenses to excessive heat or chemicals to prolong their lifespan.

For most riders, **replacing the taillight lenses and gaskets with high-quality aftermarket parts** (e.g., Speedhawk or Cycle Gear) is a cost-effective and practical upgrade that enhances both function and appearance. Pair this with a check of the taillight s internal components to ensure a complete restoration. If you re unsure about fitment or quality, consult a Yamaha specialist or a trusted motorcycle restoration forum for guidance.

Details:

Hyacinth / United Motors. Essential for restoration or maintenance, preventing moisture and dirt ingress. Spotlight: A Day Inside . The image to watch on YouTube.

Yamaha MX / ATV. Yamaha Cruisers. This NOS genuine Yamaha taillight lens gasket ensures a perfect seal for your vintage motorcycles assembly. Fits: Fits 1970-1972 Yamaha SL292, SL338, and various other vintage motorcycles.

Deflector De Vent OEM Honda Pioneer SXS700M4/M2 2014 2024 08R71-HL3-A00.

part #: 8218471200 prices

• $6.00-$47.58

specifications cyclerearbrake:

• for models: Sl292
• for makes: Yamaha
• for years: 1970-1972
• mpn: 821-84712-00
• part type: Taillight Gasket Len
• country of origin: United States
• manufacturer warranty: Unspecified Length
• storage location: E1 Karl7-n Buk 1 Bin 6

returns cyclerearbrake:

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

general cyclerearbrake:

• Motorcycle Scooter Parts Accessories > Lighting Lamps > Tail Brake Light Assemblies
• condition: New other see details

payments cyclerearbrake:

• wallet: Google-pay
• credit card: Visa
• other

offer cyclerearbrake:

• quantity: 1
• options: Ship-to-home
• best offers: True
• started: February 7, 2026
• availability: In Stock
• sold: 0

shipping cyclerearbrake:

• service: USPS Ground Advantage, USPS Priority Mail, FedEx 2Day, Overnight
• cost: $0.00
• transit: 4-10 Days
• type: Fixed
• carrier: USPS, FedEx
• class: Standard, Expedited, One-day

seller cyclerearbrake:

• rating: 99.3%
• # reviews: 208995
• city: Odessa, Florida

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