HONDA 8584009 Chamber Exhaust 18310-413-013

( Manufacturer Part Number: 8584009 ), ( Thread Diameter: As Shown ), ( Shape: As Oem ), ( Custom Bundle: No ), ( Muffler Type: Chamber ), ( Placement On Vehicle: Exhaust ), ( Unit Type: Unit ), ( Inlet Diameter: Same As Oem ), ( Features: 100 Accuracy Of Fit ), ( Sound Level: Oem ), ( Finish: Flat Black ), ( Non-domestic Product: Yes ), ( Mounting Style: Bolt-on, Clamp-on ), ( Machine Type: Street Motorcycle ), ( Color: Black ), ( Material: Steel ), ( Applicable Regions: Taiwan ), ( Type: Pre Chamber Exhaust ), ( Ipn: 18310-413-013 )

Review HONDA Pre chamber Exhaust fits CM450 1983

The **Honda 8584009 1983 CM450 Pre-Chamber Exhaust** is a meticulously crafted, high-performance component designed specifically for Honda s legendary **CM450 Super Hawk**, a motorcycle renowned for its rugged reliability and off-road prowess. This exhaust system is a direct replacement for the stock pre-chamber exhaust, engineered to enhance both the engine s breathing and its overall performance while maintaining the classic aesthetic of the 1983 model. Crafted from high-quality **chrome-molybdenum steel**, the exhaust features a robust, heat-resistant construction that ensures durability under the demanding conditions of trail riding, motocross, or competitive racing. The system incorporates a **single 2.5-inch diameter outlet**, optimized for improved exhaust flow and reduced backpressure, which translates to better throttle response, increased horsepower, and a more aggressive exhaust note ideal for riders seeking a balance between power and sound. The pre-chamber design, a hallmark of Honda s early off-road engines, is preserved in this aftermarket unit, ensuring compatibility with the stock airbox and carburetion setup while delivering a more refined and efficient combustion process. Whether used for daily trail riding, track days, or restoration projects, this exhaust system stands out for its **precision machining, smooth finish, and attention to detail**, making it a sought-after upgrade for enthusiasts who appreciate both performance and authenticity. Its straightforward installation requiring minimal modifications allows riders to quickly enhance their CM450 s performance without compromising the motorcycle s original character. For those seeking a subtle yet effective boost in power and a distinctive growl, the **Honda 8584009 1983 CM450 Pre-Chamber Exhaust** is an excellent choice, blending heritage engineering with modern performance tuning.

### Pros and Cons of Buying a 1983 Honda CM450 with a Pre-Chamber Exhaust (Part Number 8584009)

#### **Pros**

1. **Classic Reliability** The Honda CM450 is a well-regarded off-road motorcycle known for its durability and strong performance. The pre-chamber exhaust system was a common upgrade in the 1980s, improving throttle response and power delivery, especially in stock or lightly modified engines.

2. **Performance Boost** The pre-chamber exhaust (often paired with a larger carburetor or other mods) can enhance low-end torque and mid-range power, making the bike more responsive in rough terrain. This was particularly useful for trail riding and light rock crawling.

3. **Nostalgia and Collectibility** If you appreciate vintage Honda designs, the CM450 is a classic dual-sport bike with a cult following. Owning one can be a rewarding experience for enthusiasts who enjoy restoring or maintaining older machinery.

4. **Simplicity of Modifications** The CM450 s straightforward design makes it easier to work on compared to more complex modern bikes. Many parts are still available through aftermarket suppliers, and the engine is forgiving of minor neglect.

5. **Lower Cost of Ownership (Compared to Modern Bikes)** Fuel, maintenance, and insurance costs are typically lower than those of contemporary dual-sports. Parts like the exhaust can be sourced affordably, though some components may require sourcing from specialty dealers.

6. **Off-Road Capability** The CM450 was designed for trail riding, and its lightweight frame, simple suspension, and robust engine make it a capable off-road machine. With proper maintenance, it can handle rough terrain well.

7. **Potential for Customization** Beyond the exhaust, the CM450 can be further modified with aftermarket parts like larger tires, upgraded suspension, or performance carburetors. This allows owners to tailor the bike to their riding style.

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#### **Cons**

1. **Age and Wear** A 1983 bike is likely to have significant mileage and wear, especially if it hasn t been well-maintained. Rust, worn suspension, and degraded components (e.g., clutch, chain, or bearings) are common issues that may require extensive repairs.

2. **Reliability Concerns** While the CM450 is durable, older engines can suffer from carbon buildup, piston ring wear, or valve issues if not regularly serviced. The pre-chamber exhaust system, while beneficial, can also contribute to carbon fouling if the bike isn t run frequently or properly tuned.

3. **Limited Modern Support** Unlike newer bikes, finding OEM parts for a 1983 CM450 can be challenging. While aftermarket suppliers exist, some components may be discontinued or require custom ordering. This can lead to longer wait times or higher costs for replacements.

4. **Safety and Compliance** The bike may not meet modern safety standards, such as updated lighting, brakes, or frame rigidity. Retrofitting it with modern safety features (e.g., disc brakes, LED lights) can be costly and may not always be practical.

5. **Fuel and Emissions Issues** Older bikes often struggle with modern fuel standards. Gasoline today contains less lead and more ethanol than in the 1980s, which can affect performance and longevity. Some riders report issues with fuel injectors or carburetor tuning when using contemporary fuel.

6. **Riding Experience** The CM450 s ergonomics and suspension are designed for a different era. The seat is often uncomfortable for taller riders, and the suspension may feel stiff or outdated compared to modern dual-sports. The lack of ABS or advanced traction control could also be a concern for some riders.

7. **Resale Value** Classic bikes like the CM450 hold some value among collectors, but they depreciate over time. If you plan to sell it later, the resale market may not be as robust as for newer or more popular models.

8. **Maintenance Intensity** Keeping an older bike running smoothly requires regular attention. This includes checking for rust, lubricating moving parts, and addressing minor issues before they become major problems. For busy owners, this can be time-consuming.

9. **Noise and Vibration** The pre-chamber exhaust, while performance-oriented, can make the bike louder than stock. Additionally, the engine and drivetrain may produce more vibration than modern bikes, which can be fatiguing during long rides.

10. **Legal Restrictions** Depending on your location, older bikes may face restrictions on registration, insurance, or road legality. Some areas require modern safety features (e.g., turn signals, reflectors) that may not be easily retrofitted.

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### **Conclusion**

Buying a 1983 Honda CM450 with a pre-chamber exhaust can be a rewarding experience if you prioritize nostalgia, off-road capability, and the challenge of maintaining a classic bike. The performance benefits of the exhaust system, combined with the bike s ruggedness, make it a strong choice for enthusiasts who enjoy tinkering and restoring machinery. However, the potential for hidden mechanical issues, higher maintenance demands, and limited modern support mean it s not the best fit for casual riders or those seeking a hassle-free experience.

If you re drawn to the CM450, be prepared to invest time and effort into its upkeep. A thorough inspection by a mechanic familiar with vintage Hondas is essential before purchasing to assess the engine, frame, and suspension. If the bike is in good condition and you re willing to commit to its care, it can be an excellent addition to your collection or a fun project bike.

For those who prefer reliability, modern features, and lower maintenance, a newer dual-sport or adventure bike would likely be a more practical choice. The CM450 is best suited for riders who appreciate its heritage and are willing to embrace the challenges of owning a piece of motorcycle history.

Details:

Item is in used working condition, no leaks or cracks. Item comes as shown in the photos. Does have pitting, surface rust.

part #: 8584009 prices

• $74.95-$199.91

specifications cyclemufflermo:

• for models: Cm450
• for makes: Honda
• for years: 1983
• mpn: 8584009
• thread diameter: As Shown
• shape: As Oem
• custom bundle: No
• muffler type: Chamber
• placement on vehicle: Exhaust
• unit type: Unit
• inlet diameter: Same As Oem
• features: 100 Accuracy Of Fit
• sound level: Oem
• finish: Flat Black
• non-domestic product: Yes
• mounting style: Bolt-on, Clamp-on
• machine type: Street Motorcycle
• color: Black
• material: Steel
• applicable regions: Taiwan
• type: Pre Chamber Exhaust
• ipn: 18310-413-013

returns cyclemufflermo:

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

general cyclemufflermo:

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

payments cyclemufflermo:

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

seller cyclemufflermo:

• city: Beavertown, Pennsylvania
• rating: 100.0%
• # reviews: 307

offer cyclemufflermo:

• quantity: 1
• best offers: True
• options: Ship-to-home
• started: February 9, 2026
• sold: 0
• availability: In Stock

shipping cyclemufflermo:

• carrier: USPS
• cost: $0.00
• type: Calculated
• class: Standard
• service: USPS Ground Advantage
• transit: 3-9 Days

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