HONDA 40510-MC9-670 Chain Guard Chaincase

( Manufacturer Part Number: 40510-MC9-670 ), ( Part Type: Guard Chain ), ( Machine Type: Motorcycle ), ( Color: Silver ), ( Item Diameter: Oem ), ( Compatible Model: Cb450sc Nighthawk ), ( Material: Chrome ), ( Vintage Part: Yes ), ( Placement On Vehicle: Left, Rear ), ( Unit Type: Unit ), ( Universal Fitment: No ), ( Country Of Origin: Japan )

Review HONDA Chrome Chain Guard Chaincase fits NIGHTHAWK CB450 CB 450 SC 1982–1986

The **Honda 40510-MC9-670 Chain Guard/Chaincase (1982 1986 CB450 Nighthawk)** is a meticulously engineered aftermarket component designed to enhance both the durability and aesthetics of your classic Honda CB450 Nighthawk. Crafted to fit seamlessly with the iconic 1982 through 1986 model years, this chain guard and chaincase assembly serves as a protective barrier between the drivetrain and the surrounding elements, shielding the chain and sprocket from dirt, debris, and moisture while reducing maintenance demands. The durable construction ensures longevity, minimizing the risk of premature wear on the chain and sprocket, which is particularly beneficial for riders who frequently navigate rough terrain or wet conditions. Beyond its functional advantages, this part also contributes to the bike s timeless appeal, maintaining the Nighthawk s sporty yet utilitarian aesthetic with a clean, integrated design. Whether you re restoring a vintage CB450 to showroom condition or simply looking to extend the life of your existing drivetrain, this chain guard and chaincase is an essential upgrade that balances performance and protection. Its precise fitment ensures easy installation, allowing riders to quickly enhance their bike s reliability without compromising on style.

### **Pros and Cons of Buying a 1982-1986 Honda CB450 Nighthawk (Model 40510-MC9-670 with Chain Guard/Chaincase)**

#### **Pros**

1. **Classic Design and Nostalgia** The CB450 Nighthawk is an iconic motorcycle from the early 1980s, appealing to enthusiasts who appreciate retro styling and the era s mechanical simplicity. Its aggressive, angular fairings and single-seat design give it a distinct look that stands out on the road.

2. **Reliable Honda Engine** The CB450 features Honda s air-cooled, 449cc parallel-twin engine, known for durability and straightforward maintenance. With proper care, these engines can last well beyond 50,000 miles, making them a solid choice for riders who prioritize longevity over performance.

3. **Simple Mechanics** Compared to modern bikes, the CB450 has a relatively uncomplicated drivetrain and electrical system. This means repairs are often easier and less expensive to perform, even for hobbyists. The absence of complex electronics (like modern fuel injection) reduces potential failure points.

4. **Lightweight and Maneuverable** Weighing around 400 450 lbs (dry), the CB450 is lighter than many modern cruisers or sport-tourers, making it easier to handle in tight spaces and at lower speeds. Its compact size also makes it practical for urban riding or short trips.

5. **Chain Guard/Chaincase (Optional but Useful)** The chain guard or chaincase (depending on the exact model) helps protect the drivetrain from dirt, debris, and minor impacts. While not as robust as a modern belt drive, it does extend the life of the chain and sprocket, reducing maintenance frequency.

6. **Affordable to Purchase and Maintain** Used CB450s in this era are relatively inexpensive compared to modern bikes, often ranging between $2,000 and $5,000 depending on condition. Parts are widely available, and labor costs are low, making ownership budget-friendly.

7. **Versatile Riding Experience** The bike s upright riding position and moderate power (around 30 35 hp) make it suitable for casual commuting, weekend rides, or even light track use (with modifications). It s not a high-performance machine, but it s comfortable for long distances at moderate speeds.

8. **Community and Customization Potential** The CB450 has a dedicated fanbase, with aftermarket parts, restoration guides, and forums (e.g., *Honda CB450 Nighthawk* groups) available for support. Riders can easily modify the bike for better performance, comfort, or aesthetics (e.g., upgrading the exhaust, suspension, or adding a windscreen).

9. **Fuel Efficiency** With a 3.3-gallon fuel tank and a thirsty parallel-twin engine, the CB450 offers decent mileage for its class, typically averaging 50 60 mpg on a mix of highway and city riding.

10. **No Modern Complexity** Unlike bikes with complex electronic fuel injection, traction control, or ABS, the CB450 s carbureted system is easier to diagnose and fix without expensive diagnostic tools.

---

#### **Cons**

1. **Outdated Technology** The bike lacks modern safety features such as ABS, traction control, or even reliable electrical systems. The carburetions can be finicky, requiring frequent tuning, especially in varying weather conditions. The lack of electronic ignition means more frequent spark plug replacements.

2. **Poor Fuel Economy Compared to Modern Bikes** While decent for its era, the CB450 s fuel efficiency pales in comparison to modern bikes, which can achieve 80 mpg. The engine s design and carburetors contribute to higher fuel consumption.

3. **Comfort Limitations** The bike s rigid frame and basic suspension (often stock or lightly upgraded) can make long rides uncomfortable, especially on rough roads. Modern ergonomics, such as adjustable seats or ergonomic handlebars, are absent.

4. **Reliability Issues with Age** Even with proper maintenance, the CB450 s age means components like the clutch, rear fork seals, and electrical wiring may wear out over time. Rust can be an issue in humid climates, particularly on the frame and drivetrain.

5. **Limited Power and Performance** At around 30 35 hp, the CB450 is underpowered by today s standards. It struggles to keep up with modern bikes on highways and lacks the torque needed for aggressive riding. Modifications (e.g., porting, camshaft upgrades) can improve performance but require mechanical skill.

- **Carburetor tuning** (often monthly, depending on riding conditions).

- **Chain and sprocket maintenance** (regular lubrication and tension checks).

- **Spark plug replacements** (every 10,000 15,000 miles).

- **Brake pad and fluid changes** (drum brakes are less efficient than modern discs).

- **Rust prevention** (especially in wet climates).

7. **Resale Value** Classic bikes like the CB450 hold value among enthusiasts, but they depreciate faster than modern bikes. If you plan to sell later, the market is niche, and demand may be limited compared to more popular models.

8. **Safety Concerns** The lack of modern safety features (e.g., ABS, traction control) increases the risk of accidents, particularly in wet or slippery conditions. The bike s lightweight frame also makes it more susceptible to tipping at low speeds.

9. **Noise and Vibration** The air-cooled engine and lack of modern sound insulation make the CB450 louder and more vibration-prone than modern bikes. This can lead to rider fatigue on long rides.

10. **Limited Aftermarket Support** While there is a community, the aftermarket for parts and upgrades is not as extensive as for more modern or popular bikes (e.g., Honda CBR, Yamaha Thundercat). Finding rare or high-quality aftermarket components may require extra effort.

---

### **Conclusion**

The **1982 1986 Honda CB450 Nighthawk (with chain guard/chaincase)** is a **fantastic choice for riders who prioritize simplicity, nostalgia, and low-cost ownership** over modern performance and convenience. It s ideal for:

- **Enthusiasts who enjoy classic bikes** and don t mind occasional maintenance.

- **Budget-conscious riders** who want a reliable, affordable machine.

- **Those who prefer a lightweight, maneuverable bike** for urban or casual riding.

- **Riders open to DIY repairs** and mechanical tinkering.

- **High performance or highway cruising** (modern bikes are far more capable).

- **Modern safety features** (ABS, traction control, etc.).

- **Long-distance comfort** (ergonomics and suspension are basic).

- **Minimal maintenance** (carburetors and mechanical components require regular attention).

If you re drawn to the bike s **retro charm, mechanical simplicity, and affordability**, it can be a rewarding project or a fun daily rider. But if you need **modern reliability, performance, or safety**, a newer bike would be a better investment.

---

### **Recommendation**

- You re a **mechanically inclined rider** who enjoys working on your bike.

- You want a **low-cost, no-frills motorcycle** for casual riding or commuting.

- You appreciate **classic design** and don t mind its limitations.

- You re willing to **invest time in maintenance** (carb tuning, chain care, etc.).

- You plan to **modify or restore it** as a hobby.

- You prioritize **modern safety and performance**.

- You want a **comfortable, long-distance bike** with ergonomic features.

- You dislike **frequent mechanical adjustments** (e.g., carburetors, spark plugs).

- You re looking for a **high-resale-value or low-maintenance** bike.

- You ride in **harsh climates** (extreme cold or humidity may accelerate wear).

- If you like the **Nighthawk s look but want more modern features**, consider a **used Honda CB500F or CB600F** (similar styling, better reliability).

- For a **simpler, more rugged bike**, a **Yamaha XS650 or Suzuki GS450** (both from the same era) may offer better balance of power and maintainability.

- If you want a **modern classic**, look at **restored or lightly used CB750s or CB900Fs**, which retain some retro charm with improved reliability.

Ultimately, the CB450 Nighthawk is a **great bike for the right rider** one who values **character over convenience** and isn t afraid of a little extra work. For everyone else, modern alternatives may be a better fit.

Details:

Free shipping in the contiguous USA. Chrome is very shiny with a few minor light pits/imperfections/light Scratches. Mounting bolts included. Very good condition.

Chain guard from a 1982 Honda CB450SC Nighthawk. No dents, no cracks, holes or rot. Message with any questions. Free shipping for the contiguous USA only.

Presents well. Fits 82-86 CB450SC. AK, HI, PR must request a shipping quote prior to purchase. Check my other listings for more Honda CB parts.

Guard retails for $156.42 from Consolidated.

part #: 40510mc9670 prices

• $23.46-$79.00

specifications cyclevintagee:

• for models: Cb450, Cb, 450, Sc, Nighthawk
• for makes: Honda
• for years: 1982-1986
• mpn: 40510-mc9-670
• part type: Guard Chain
• machine type: Motorcycle
• color: Silver
• item diameter: Oem
• compatible model: Cb450sc Nighthawk
• material: Chrome
• vintage part: Yes
• placement on vehicle: Left, Rear
• unit type: Unit
• universal fitment: No
• country of origin: Japan

offer cyclevintagee:

• sold: 0
• options: Ship-to-home
• quantity: 1
• availability: In Stock
• started: May 13, 2026

payments cyclevintagee:

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

shipping cyclevintagee:

• type: Fixed
• service: FedEx Ground / FedEx Home Delivery
• class: Standard
• cost: $0.00
• carrier: FedEx
• transit: 3-7 Days

general cyclevintagee:

• condition: Used
• Parts Accessories > Motorcycle Scooter Parts Accessories > Other Motorcycle Scooter Parts Accessories

returns cyclevintagee:

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

seller cyclevintagee:

• # reviews: 4148
• city: Amelia Court House, Virginia
• rating: 100.0%

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