HONDA 18320-KL4-770 Dual Front Exhaust Pipe Header Manifold

( Manufacturer Part Number: 18320-KL4-770 ), ( Part Type: Pipe Exhaust Header Manifold ), ( Country Of Origin: Japan )

Review HONDA Dual Front Exhaust Pipe Header Manifold fits XL250 XL250R 1985–1987

The **Honda 18320-KL4-770** is a meticulously engineered dual front exhaust header manifold designed exclusively for the **1985 1987 Honda XL250 and XL250R**, offering a blend of performance enhancement and timeless styling for these iconic dual-sport motorcycles. Crafted from high-quality **chrome-molybdenum steel**, this header manifold is built to withstand the rigors of off-road and on-road riding while delivering a noticeable improvement in exhaust flow and engine response. The **dual front exhaust configuration** not only enhances the motorcycle s aggressive, sporty aesthetic but also optimizes exhaust gas evacuation, reducing backpressure and allowing the **air-cooled, single-cylinder 249cc engine** to breathe more efficiently. This results in a sharper throttle response, improved mid-range power, and a more engaging exhaust note that resonates with the classic growl of the original KL4 engine. The **precision-machined design** ensures a seamless fit with the stock exhaust system, requiring minimal modification, while the **durable construction** guarantees longevity even under demanding conditions. Whether tackling rough trails or cruising on paved roads, this header manifold transforms the XL250 and XL250R into a more dynamic and spirited riding experience, all while maintaining the authenticity of Honda s legendary engineering from the late 1980s. Perfect for both restoration projects and daily riders seeking a subtle yet effective performance upgrade, the **18320-KL4-770** is a must-have accessory for enthusiasts who appreciate both function and form in their classic adventure bikes.

### **Pros and Cons of Buying a 1985 1987 Honda XL250/XL250R (18320-KL4-770) with Dual Front Exhaust and Header Manifold**

#### **Pros**

1. **Reliability and Durability**

The Honda XL250/XL250R from the mid-1980s is known for its robust, air-cooled single-cylinder engine, which is simple yet durable if maintained properly. Many of these bikes still run strong after decades with basic upkeep.

2. **Off-Road Capability**

The XL250 was designed as a dual-sport bike, making it well-suited for light trail riding, commuting, and even some serious off-roading if properly modified. The suspension (though basic by modern standards) is adequate for its class.

3. **Fuel Efficiency**

With a 249cc engine, this bike is extremely fuel-efficient, often averaging **80 100 mpg** depending on riding style. This makes it ideal for short commutes or weekend adventures without frequent stops for gas.

4. **Low Cost of Ownership**

Parts are widely available and relatively inexpensive compared to modern bikes. Labor costs are also lower, and insurance premiums tend to be modest.

5. **Simplicity and Ease of Maintenance**

The engine is straightforward, with fewer components than modern multi-cylinder bikes. Basic maintenance (oil changes, chain adjustments, spark plug replacements) can be done at home with minimal tools.

6. **Classic Appeal and Nostalgia**

For enthusiasts who appreciate the retro design and simplicity of older Japanese dual-sports, this bike offers a nostalgic riding experience. The XL250 has a cult following among vintage motorcycle fans.

7. **Modification Potential**

The engine can be upgraded with aftermarket parts (e.g., headers, exhaust, carburetor kits) to improve performance. The dual front exhaust setup you re considering is a common modification that enhances sound and slightly improves airflow.

8. **Lightweight and Maneuverable**

At around **200 220 lbs** (depending on modifications), it s easy to handle in tight spaces, making it great for urban riding or parking in crowded areas.

9. **Proven Long-Term Performance**

Many XL250s from this era have been ridden for **200,000 miles** with proper care. If the bike has been well-maintained, it could easily last another 100,000 miles.

10. **Lower Risk of Theft**

Compared to modern bikes, these are less targeted by thieves, reducing insurance and security concerns.

---

#### **Cons**

1. **Outdated Technology**

The bike lacks modern safety features such as **traction control, ABS, or advanced suspension systems**. Riding on rough terrain or at high speeds can be less forgiving than on a modern dual-sport.

2. **Poor Fuel Injection (Carbureted)**

The XL250 uses a **CV carburetor**, which is less efficient and more prone to tuning issues than modern fuel-injected engines. Cold starts and high-altitude performance can be inconsistent.

3. **Weak Power Delivery**

The stock engine produces only about **18 20 horsepower**, which is sufficient for light off-roading but feels underpowered on highways or when carrying a passenger. The dual exhaust helps slightly, but performance gains are limited.

4. **Basic Suspension**

The **front telescopic fork and rear swingarm with a single shock** are adequate but stiff by today s standards. Comfort on rough terrain is decent but not as smooth as modern dual-sports.

5. **Limited Comfort for Long Rides**

The ergonomics are basic narrow seat, upright riding position, and minimal wind protection make it less comfortable for extended highway rides compared to modern adventure bikes.

6. **Rust and Wear Concerns**

Many older bikes suffer from **frame rust, seized bearings, or worn-out suspension**. A thorough inspection is crucial before purchase, especially if the bike has been stored in wet conditions.

7. **Resale Value is Low**

Unlike some classic bikes (e.g., Honda CB750, Yamaha XT600), the XL250 does not hold its value well. If you plan to sell later, you may not recover much of your investment.

8. **Limited Aftermarket Support**

While parts exist, finding **modern OEM or high-quality aftermarket components** (e.g., modern tires, electronics) can be challenging compared to newer bikes.

9. **Noise and Vibration**

The single-cylinder engine is **loud and vibration-heavy**, especially at higher RPMs. The dual exhaust helps with sound, but it remains noticeably noisier than modern bikes.

10. **Legal Restrictions in Some Areas**

Some regions have **noise ordinances** that may restrict the use of aftermarket exhausts (like the dual front setup you re considering). Check local regulations before modifying.

---

### **Conclusion**

- **Prioritize reliability, simplicity, and low cost** over modern amenities.

- **Enjoy off-road or light adventure riding** rather than highway cruising.

- **Appreciate the classic Honda build quality** and don t mind basic ergonomics.

- **Plan to maintain it properly** (oil changes, chain adjustments, rust prevention).

- **Are okay with limited power and comfort** compared to newer bikes.

- **Need a bike for long-distance touring** (comfort and modern features are lacking).

- **Require high-speed stability** (the bike feels sluggish on highways).

- **Want a bike that holds value** (resale is minimal).

- **Prefer fuel injection and modern electronics** (carbureted engines are less efficient).

- **Live in an area with strict noise laws** (aftermarket exhausts may be restricted).

---

### **Recommendation**

If you re buying this bike **for fun, nostalgia, or light off-road use**, it s a **great budget-friendly choice** that can provide years of reliable service. **Prioritize buying from a reputable seller** who provides a **full service history** and a **pre-purchase inspection**. Focus on checking:

- **Engine condition** (no excessive wear, proper compression, no oil leaks).

- **Suspension** (forks and shock should move smoothly without excessive play).

- **Frame and fuel tank** (no major rust or cracks).

- **Chain and sprocket** (proper tension, no excessive wear).

- **Electrical system** (working lights, ignition, and starter).

If you plan to **modify it significantly** (e.g., full exhaust, suspension upgrades, carburetor tuning), budget for **$1,500 $3,000** depending on condition. For a **fully restored, ride-ready bike**, expect to pay **$2,500 $4,000**.

Buy it if you want a **fun, no-frills dual-sport** that s easy to maintain and reliable. Don t buy it if you expect **modern comfort, power, or long-distance capability**. With proper care, it can be a **great companion for weekend adventures**.

Details:

Removed from a 1986 XL250, Free shipping is to 48 states.

part #: 18320kl4770 prices

• $42.50-$69.95

specifications cyclemufflermo:

• for models: Xl250, Xl250r
• for makes: Honda
• for years: 1985-1987
• mpn: 18320-kl4-770
• part type: Pipe Exhaust Header Manifold
• country of origin: Japan

seller cyclemufflermo:

• city: Lerna, Illinois
• # reviews: 206
• rating: 99.0%

payments cyclemufflermo:

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

returns cyclemufflermo:

• policy: No Returns

shipping cyclemufflermo:

• transit: 5-11 Days
• carrier: USPS
• class: Standard
• cost: $0.00
• service: USPS Ground Advantage
• type: Calculated

offer cyclemufflermo:

• options: Ship-to-home
• started: May 4, 2026
• availability: In Stock
• quantity: 1
• sold: 0

general cyclemufflermo:

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

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