HONDA 2205573 Exhaust Expansion Chamber

( Manufacturer Part Number: 2205573 ), ( Type: Muffler )

Review HONDA Exhaust Expansion Chamber fits CR125R 1988

The **Honda 1988 CR125R 2205573 Exhaust Expansion Chamber** is a meticulously crafted, high-performance component designed to enhance the breathing and efficiency of Honda s legendary CR125R off-road motorcycle from the late 1980s. This expansion chamber is a direct replacement for the original, ensuring a perfect fit while delivering improved exhaust flow and power output. Crafted from high-quality stainless steel, it is built to withstand the rigors of trail riding, offering both durability and resistance to corrosion, even in harsh environments. The chamber features a precision-engineered design optimized for optimal exhaust gas velocity, reducing backpressure and allowing the engine to breathe more freely, which translates to better throttle response and increased horsepower. Whether you're tackling rocky terrain, steep climbs, or technical trails, this expansion chamber helps the CR125R maintain its legendary agility and performance. Its sleek, aerodynamic shape not only improves functionality but also complements the motorcycle s classic aesthetic, blending form and function seamlessly. Ideal for riders seeking a subtle yet effective upgrade, this expansion chamber is a straightforward yet impactful modification that can significantly enhance the overall driving experience of the CR125R.

The **Honda CR125R 1988 exhaust expansion chamber (part number 2205573)** is a popular aftermarket upgrade for enthusiasts looking to improve the bike s performance, sound, and aesthetics. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the 1988 CR125R Expansion Chamber (2205573)**

1. **Improved Exhaust Note**

The stock exhaust on the CR125R is often criticized for being dull and uninspiring. This expansion chamber produces a deeper, more aggressive tone that many riders find more satisfying, especially in the mid-to-high RPM range. The note is often described as "scoopy" and more engaging than the stock exhaust.

2. **Better Flow and Performance**

The expansion chamber is designed to improve exhaust gas flow, which can lead to slight power gains, particularly in the upper RPM range. While the gains may not be dramatic (typically in the range of 1-3 horsepower), they can make the bike feel more responsive, especially when paired with other modifications like a ported head or upgraded carburetor.

3. **Aesthetic Appeal**

The expansion chamber has a distinct, aggressive look that stands out compared to the stock exhaust. It is often used as part of a full exhaust system (paired with a muffler like the **Honda 2205574** or aftermarket options) to give the bike a more modern or "race-inspired" appearance.

4. **Compatibility with Other Mods**

- **Ported heads** (e.g., **CR125R ported head kits**)

- **Upgraded carburetors** (e.g., **Pike Performance or Mikuni carburetor**)

- **Aftermarket mufflers** (e.g., **Vega, Akrapovic, or other high-flow options**)

This makes it a versatile choice for riders looking to build a more powerful or performance-oriented bike.

5. **Widely Available and Affordable**

The part is relatively inexpensive (typically ranging from **$50 to $100**, depending on the seller and condition) and easy to find on platforms like eBay, Facebook Marketplace, or specialty motorcycle parts stores. This makes it an accessible upgrade for budget-conscious riders.

6. **Easy to Install**

The installation process is straightforward for someone with basic mechanical skills. It involves removing the stock exhaust, installing the new expansion chamber, and securing it with the appropriate clamps and gaskets. Most riders can complete the job in under an hour with the right tools.

7. **Positive Community Feedback**

The CR125R community has extensively tested this expansion chamber, and many riders report noticeable improvements in both sound and performance. Online forums (e.g., **CR125R forums, Honda forums, or Reddit**) frequently highlight its effectiveness as a first-step exhaust upgrade.

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### **Cons of the 1988 CR125R Expansion Chamber (2205573)**

1. **Minimal Power Gains**

While the expansion chamber does improve exhaust flow, the power gains are modest. For riders expecting significant performance improvements, this may be disappointing. The real benefits lie more in the sound and aesthetic upgrades than in raw power.

2. **Noise Concerns**

The exhaust note is louder and more aggressive than stock, which may not be suitable for all riding environments. In some areas, the noise level could violate local emissions or noise ordinances, especially if paired with a high-flow muffler. Riders should check local laws before installing this part.

3. **Potential for Backfires**

If the bike is not properly tuned (e.g., carburetor adjustments, ignition timing), the expansion chamber can lead to occasional backfires, particularly during acceleration or deceleration. This is more likely if other modifications (like a ported head) are also installed.

4. **Compatibility Issues with Stock Exhaust**

The expansion chamber is designed to replace the stock exhaust system, but some riders report that the fitment can be tight or require additional modifications (e.g., cutting or bending parts of the stock exhaust). Ensuring a proper seal is crucial to avoid exhaust leaks.

5. **Durability Concerns**

While generally durable, the expansion chamber is made of steel and may develop rust or corrosion over time, especially if the bike is ridden in wet or salty conditions. Regular maintenance and cleaning can help mitigate this issue.

6. **Limited Longevity with Other Mods**

If the bike is heavily modified (e.g., with a ported head, upgraded carburetor, and high-compression pistons), the stock engine may struggle to handle the increased stress. The expansion chamber alone may not be enough to support such modifications without further tuning or engine upgrades.

7. **Potential for Emissions Issues**

The expansion chamber is not designed for emissions compliance in modern regions. If the bike is used in areas with strict emissions regulations (e.g., California), installing this part may require additional modifications or could result in a failed emissions test.

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### **Conclusion**

The **Honda 2205573 1988 CR125R expansion chamber** is a solid upgrade for riders looking to enhance the bike s exhaust note, aesthetics, and minor performance. It is a cost-effective and widely compatible part that pairs well with other common modifications. However, the power gains are modest, and the noise level may not suit all riding environments. For riders who prioritize sound and appearance over significant performance improvements, this is an excellent choice. For those seeking more substantial power gains, additional modifications (e.g., ported head, upgraded carburetor, or muffler) will be necessary.

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### **Recommendation**

- You want a deeper, more engaging exhaust note.

- You plan to pair it with other mods (e.g., ported head, upgraded carburetor, or aftermarket muffler).

- You are on a budget and want an affordable first step toward a more performance-oriented bike.

- You ride in areas where noise regulations are not overly strict.

- You expect significant power gains without additional modifications.

- You ride in areas with strict noise or emissions laws.

- You plan to use the bike primarily for commuting or in urban environments where a loud exhaust may be problematic.

- You are not comfortable with basic mechanical work (installation is straightforward but requires attention to detail).

1. Pair it with a **high-quality muffler** (e.g., **Vega or Akrapovic**) for better performance and sound.

2. Consider **porting the head** and **upgrading the carburetor** (e.g., **Pike Performance or Mikuni**) to maximize power gains.

3. Ensure proper **sealing and clamps** to avoid exhaust leaks.

4. Monitor for **backfires** and adjust the carburetor or ignition timing if necessary.

5. Regularly inspect for **rust or corrosion**, especially if riding in harsh conditions.

Overall, this expansion chamber is a **great value for the CR125R community** and a popular choice for riders looking to customize their bike without a large investment.

Details:

If the item does not fit motorcycle model specified in listing. ADDRESS: Steele's Cycle, 2025 W. More options available upon request. Each part is systematically placed to be easily located once purchased.

; 1988 HONDA CR125R EXHAUST EXPANSION CHAMBER. Many countries only allow 79 max package length and girth combined. Inglewood, CO 80110.

part #: 2205573 price

• $249.99

specifications cyclemufflermo:

• for models: Cr125r
• for makes: Honda
• for years: 1988
• mpn: 2205573
• type: Muffler

returns cyclemufflermo:

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

offer cyclemufflermo:

• availability: In Stock
• sold: 0
• best offers: True
• started: March 12, 2026
• quantity: 1
• options: Ship-to-home

shipping cyclemufflermo:

• carrier: FedEx
• class: Standard
• cost: $49.99
• service: FedEx Ground / FedEx Home Delivery
• transit: 4-7 Days
• type: Fixed

payments cyclemufflermo:

• wallet: Paypal
• credit card: Diners-club
• other

seller cyclemufflermo:

• city: Englewood, Colorado
• rating: 100.0%
• # reviews: 57347

general cyclemufflermo:

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

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