fits model: Re. make: Yamaha. year: 1966–1967.

( Part Type: Muffler ), ( UPC: 134147102200 )
The **Yamaha 134-14710-22-00 1966-1967 YL1 TwinJet Re-Chromed Muffler Set (Left & Right)** is a meticulously crafted, high-performance exhaust component designed exclusively for Yamaha s iconic YL1 TwinJet models from the 1966 and 1967 production years. This premium muffler set features a polished, **re-chromed finish**, delivering a striking, show-stopping aesthetic that enhances the classic appeal of your motorcycle while ensuring superior durability and corrosion resistance. Crafted from high-quality, heavy-duty steel, these mufflers are built to withstand the rigors of daily riding, providing both visual and functional excellence. The **TwinJet exhaust system** is renowned for its distinctive, aggressive sound profile, offering a deep, resonant growl that turns heads and satisfies the purist in every rider. Each muffler in this set is carefully matched for symmetry, ensuring a balanced fit and optimal exhaust flow, which not only improves engine performance but also contributes to a smoother, more engaging riding experience. Whether you're cruising down a scenic highway or showcasing your bike at a vintage meet, this re-chromed muffler set elevates the YL1 s already legendary presence, blending timeless style with uncompromising quality. Perfect for restorers, collectors, and enthusiasts who demand nothing less than perfection, this exhaust upgrade is a must-have for preserving and enhancing the spirit of Yamaha s golden-era motorcycles.
### **Pros and Cons of buying a Yamaha YL1 TwinJet Muffler Set (1966-1967, Re-Chromed)**
#### **Pros:**1. **Authentic Fit and Functionality** This is an OEM-style muffler set designed specifically for Yamaha YL1 TwinJet models from 1966 and 1967. It ensures proper fitment, performance, and compatibility with the engine s exhaust system.
2. **Re-Chromed Finish** The re-chromed treatment improves the mufflers appearance, preventing rust and corrosion while maintaining a polished, vintage look. This is particularly useful if the original mufflers were rusted or damaged.
3. **Sound and Performance** Unlike aftermarket exhausts that may alter the engine s sound significantly, this set is designed to replicate the stock exhaust tone, which is often preferred by purists who want to preserve the classic Yamaha sound.
4. **Durability** High-quality re-chromed mufflers are less prone to wear compared to untreated or poorly finished parts. They should last longer than rusted or neglected original mufflers.
5. **Ease of Installation** Since these are direct replacements for the stock mufflers, installation is relatively straightforward for someone with basic mechanical skills. No major modifications to the exhaust system are typically required.
6. **Preservation of Value** If you plan to keep or sell your YL1 in the future, maintaining OEM-style parts (or high-quality replacements) helps preserve its originality and resale value.
7. **Reliability** Yamaha s original components (or well-made replicas) are generally reliable, reducing the risk of leaks or premature failure compared to cheap aftermarket alternatives.
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#### **Cons:**1. **Cost** Re-chromed OEM-style mufflers are more expensive than basic aftermarket or rusted original parts. If budget is a concern, this may be a significant investment.
2. **Limited Sound Modification** If you prefer a louder, deeper, or more aggressive exhaust note, these mufflers will not provide that. They are designed to match the stock sound, which may be too tame for some riders.
3. **Availability of Parts** While these mufflers are available, sourcing them may require searching specialty Yamaha or vintage motorcycle parts suppliers. They are not as commonly stocked as mass-produced aftermarket parts.
4. **Potential for Rust Over Time** Even though they are re-chromed, the mufflers are still exposed to the elements. If not maintained (e.g., occasional waxing or rust protection), they may eventually rust again, especially in harsh climates.
5. **Installation Challenges** If the original mufflers were removed improperly or the exhaust system was damaged, installation could be more difficult than expected. Some rusted bolts or corroded flanges may need cleaning or replacement.
6. **No Performance Gains** Unlike high-flow exhausts, these mufflers do not improve horsepower or torque. They are purely for restoration and sound preservation.
7. **Market Demand** If you re selling the bike later, the demand for OEM-style parts may vary. Some buyers prefer aftermarket exhausts for their sound or appearance, which could slightly reduce resale value compared to a fully stock-restored bike.
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### **Conclusion**
Buying this **Yamaha YL1 TwinJet re-chromed muffler set** is an excellent choice if you prioritize **authenticity, reliability, and preservation of your bike s original character**. It is ideal for riders who want to restore their YL1 to factory condition, maintain its vintage appeal, and avoid the issues associated with rusted or poorly made parts.
However, if you are looking to **modify the sound, improve performance, or save money**, this may not be the best option. In that case, you might consider aftermarket exhausts or cheaper alternatives, though they may compromise the bike s originality.
For most **purists, restorers, or collectors**, the investment is justified. The re-chromed finish ensures longevity, and the OEM fit guarantees proper function without altering the bike s character.
### **Recommendation**
**Purchase this muffler set if:**- You are restoring your YL1 to original condition.
- You want a reliable, rust-resistant exhaust system.
- You prefer the stock sound and appearance.
- You are willing to pay for quality and authenticity.
**Avoid this muffler set if:**- You want a louder, more aggressive exhaust sound.
- You are on a tight budget and can find cheaper alternatives.
- You plan to heavily modify the bike s exhaust system.
- You are not comfortable with installation or maintenance.
**Final Verdict:** For the average YL1 owner seeking a **high-quality, long-lasting restoration part**, this is a **strong recommendation**. It balances performance, aesthetics, and reliability effectively.
It looks like they were chromed with the baffles in place. Has dings scratches, rusted out spot on one tip that has been chromed over-see photos.