YAMAHA 2J5-14753-00-00 Muffler Exhaust Silencer Baffle YZ80E

( Manufacturer Part Number: 2J5-14753-00-00 ), ( Placement On Vehicle: Exhaust ), ( Type: Muffler ), ( Machine Type: Off-road Motorcycle ), ( Inlet Diameter: 1in ), ( Outlet Diameter: 13/16 ), ( Item Diameter: 2.5 ), ( Item Length: 5in ), ( Finish: Painted ), ( Country Of Origin: Japan )

Review YAMAHA Muffler Exhaust Silencer Baffle fits YZ80 YZ 1979–1980

The **Yamaha 2J5-14753-00-00 1979 YZ80 Muffler/Exhaust Silencer** is a meticulously crafted, high-performance aftermarket component designed exclusively for Yamaha s legendary 1979 YZ80 and YZ80E models, ensuring optimal power delivery, compliance with emissions standards, and a refined riding experience. This premium baffled exhaust system is engineered to replace the stock muffler, offering a seamless integration that enhances both the throttle response and overall engine efficiency while maintaining the iconic sound signature of the classic YZ80. Constructed from durable, heat-resistant materials, the muffler features a precision-welded baffle system that effectively reduces backpressure, allowing the engine to breathe more freely and deliver a noticeable increase in horsepower and torque. The design incorporates a smooth, polished finish with a classic black or matte finish (depending on the variant), blending seamlessly with the bike s original aesthetic while adding a touch of sporty sophistication. Whether you're cruising through the trails or pushing the limits on the track, this exhaust system ensures a balanced blend of performance and compliance, making it an ideal choice for both enthusiasts seeking to restore their YZ80 s original character and riders looking to fine-tune their bike s capabilities. With its attention to detail and commitment to quality, this muffler is not just an upgrade it s a nod to the engineering brilliance of Yamaha s golden era.

### **Pros and Cons of buying a Yamaha 2J5-14753-00-00 (1979 YZ80 Muffler/Exhaust Silencer)**

1. **Authentic Fitment** This is an original Yamaha muffler designed specifically for the 1979 YZ80 and YZ80E models. It ensures a proper fit without modifications, reducing the risk of leaks or improper installation.

2. **Improved Sound and Performance** A well-functioning muffler helps regulate exhaust flow, which can enhance engine efficiency and reduce backpressure. While not a high-performance upgrade, it ensures the bike runs closer to its intended specifications.

3. **Reliability** Since this is an OEM (Original Equipment Manufacturer) part, it is built to Yamaha s standards, meaning it should last as long as the original muffler if properly maintained.

4. **Easier Maintenance** If you need to replace the muffler in the future, having an original part ensures compatibility with other OEM components, such as the exhaust header and gaskets.

5. **Aesthetic Continuity** For restoration or classic bike projects, using an original muffler helps maintain the bike s historical appearance and authenticity.

6. **Cost-Effective for Basic Repairs** If the original muffler is damaged or rusted out, replacing it with an OEM part is often cheaper than aftermarket alternatives, especially if you don t need performance modifications.

7. **No Risk of Voiding Warranty (If Applicable)** If the bike is still under warranty (unlikely for a 1979 model), using an OEM part avoids potential issues with aftermarket modifications.

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1. **Limited Performance Gains** This is not a high-flow or performance-oriented muffler. It will not significantly improve horsepower or throttle response; it s primarily for function and basic sound regulation.

2. **Potential Rust or Wear** Even OEM parts from older models may show signs of rust, corrosion, or wear, especially if stored improperly. Inspection is necessary before purchase.

3. **Difficulty Finding Parts** While Yamaha parts are available, they may not be as widely stocked as newer models. You might need to order from specialty dealers or online marketplaces, which could delay repairs.

4. **No Modern Upgrades** Unlike aftermarket mufflers, this part does not offer modern materials (e.g., stainless steel) or improved insulation, which could be beneficial for longevity and noise reduction in today s environment.

5. **Possible Counterfeit Risks** Buying from unverified sellers (e.g., eBay, Facebook Marketplace) increases the chance of receiving a fake or mismatched part. Always verify authenticity.

6. **Installation Challenges** If you re not experienced with bike exhaust systems, installing this muffler may require careful handling of gaskets, bolts, and alignment to avoid leaks or improper sealing.

7. **Sound May Not Meet Modern Standards** The 1979 YZ80 was not designed with modern noise regulations in mind. The stock muffler may produce a louder, more aggressive exhaust note, which could be undesirable in residential areas.

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Buying the **Yamaha 2J5-14753-00-00 muffler for a 1979 YZ80/YZ80E** is a practical choice if you need a **direct replacement for basic functionality, restoration, or maintenance**. It ensures compatibility and reliability but does not offer performance or noise advantages over aftermarket options. The decision depends on your priorities:

- You want an **authentic, no-frills replacement** for a damaged or worn-out muffler.

- You re restoring the bike to its original condition.

- You don t need performance upgrades and want a **cost-effective, easy-to-find solution**.

- You want **better sound insulation, stainless steel construction, or performance improvements** (e.g., aftermarket mufflers like those from **Yamaha Performance Parts, Akrapovic, or K&N**).

- You re concerned about **rust or longevity** and prefer modern materials.

- You need **quieter operation** for street use (though the YZ80 was never designed for silent operation).

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- **For most riders**, this OEM muffler is a **solid, no-nonsense choice** if you simply need a replacement. It s the safest bet for authenticity and ease of installation.

- **For performance or modern upgrades**, research aftermarket mufflers designed for the YZ80 platform (e.g., **Yamaha YZ80-specific exhaust systems** or **universal stainless steel mufflers**).

- **Before purchasing**, inspect the part for **rust, cracks, or damage**. If buying used, test the muffler for leaks or proper sealing.

- **If possible**, pair this with a **new gasket set** to prevent exhaust leaks during installation.

Ultimately, this is a **functional, budget-friendly option** for those prioritizing reliability over modern enhancements. For enthusiasts looking to modify their bike, exploring aftermarket alternatives may yield better results.

Details:

Looks to have about 4 dents dings including the one on tip. Scratches, nicks throughout. 1979 Yamaha YZ80e muffler. May fit 1980 as well not sure.

part #: 2j5147530000 prices

• $9.99-$329.99

specifications cyclemufflermo:

• for models: Yz80, Yz
• for makes: Yamaha
• for years: 1979-1980
• mpn: 2j5-14753-00-00
• placement on vehicle: Exhaust
• type: Muffler
• machine type: Off-road Motorcycle
• inlet diameter: 1in
• outlet diameter: 13/16
• item diameter: 2.5
• item length: 5in
• finish: Painted
• country of origin: Japan

offer cyclemufflermo:

• availability: In Stock
• sold: 0
• options: Ship-to-home
• quantity: 1
• started: April 23, 2026

seller cyclemufflermo:

• rating: 99.7%
• city: Tyngsboro, Massachusetts
• # reviews: 2675

shipping cyclemufflermo:

• transit: 5-11 Days
• carrier: USPS
• type: Calculated
• service: USPS Ground Advantage, USPS Priority Mail Medium Flat Rate Box
• class: Standard, Expedited
• cost: $10.33

payments cyclemufflermo:

• other
• wallet: Apple-pay
• credit card: Diners-club

general cyclemufflermo:

• Motorcycle Scooter Parts Accessories > Exhaust Emission Systems > Silencers, Mufflers Baffles
• condition: Used

returns cyclemufflermo:

• policy: No Returns

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