KEIHIN PC-08C Carburetor

( Brand: Keihin ), ( Manufacturer Part Number: PC-08C ), ( Part Type: Carburetor ), ( Machine Type: Enduro ), ( Material: Aluminum ), ( Vintage Part: Yes ), ( Country Of Origin: Japan ), ( Placement On Vehicle: Front )

Review KEIHIN Honda Xl Carburator Pc 08c fits 1975–1977

The **Keihin PC-08C carburetor**, originally designed for the legendary 1977 Honda XL75 08C often affectionately nicknamed the "Super Tight" is a meticulously engineered piece of automotive history that embodies the precision and innovation of its era. This classic carburetor, crafted for the iconic 75cc single-cylinder air-cooled engine, represents a perfect blend of simplicity and performance, tailored to deliver smooth, reliable power while maintaining the lightweight and compact nature of the XL75 s compact frame. The PC-08C features a robust, die-cast aluminum body with a polished chrome-plated exterior, giving it both durability and a timeless aesthetic that complements the bike s vintage charm. Its design incorporates a single-throat venturi system, which ensures efficient fuel-air mixture regulation, allowing the engine to breathe cleanly while maximizing throttle response. The carburetor s internal components, including the precision-machined piston and spring assembly, work in harmony to provide a consistent and responsive idle, making it ideal for both leisurely cruising and spirited riding. The PC-08C is further distinguished by its adjustable pilot jet and main jet screws, offering riders the flexibility to fine-tune performance based on fuel quality, altitude, or personal preference. Whether restored to its original glory or integrated into a modernized XL75 build, this carburetor remains a cornerstone of the bike s legendary reliability, embodying the spirit of Honda s early engineering prowess. For enthusiasts seeking authenticity or those looking to restore their XL75 to its peak condition, the Keihin PC-08C is not just a component it s a piece of mechanical heritage that ensures the soul of the Super Tight continues to roar with the same unmistakable charm it did nearly five decades ago.

The Keihin PC-08C carburetor from a 1977 Honda XL750S (or similar models) is a classic component with a mix of advantages and drawbacks, depending on your goals, budget, and experience level. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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1. **Proven Reliability and Performance**

The PC-08C is a well-designed, air-cooled carburetor built to Honda s standards in the late 1970s. It was engineered for the XL750S, a popular adventure bike of its era, and is known for delivering consistent power across a wide RPM range. Many riders report that it provides a smooth, linear powerband when properly adjusted, making it suitable for both on-road and light off-road use. The mechanical simplicity of the carburetor also means fewer electronic failures compared to modern fuel-injected systems.

2. **Ease of Maintenance and Tuning**

Carburetors like the PC-08C are relatively straightforward to service and tune. You can adjust the idle mixture, pilot jet, and main jet to optimize performance or fuel economy. This level of control is appealing to riders who enjoy hands-on tuning or who want to adapt the bike to different conditions (e.g., high-altitude riding or fuel with varying octane levels). Rebuilding or cleaning the carburetor is also less expensive than overhauling a modern fuel injection system.

3. **Compatibility and Availability of Parts**

The PC-08C is widely compatible with other Honda models from the late 1970s and early 1980s, such as the XL600V, XL650V, and some XL800 models. This means you can find aftermarket parts, rebuild kits, and replacement components relatively easily. Additionally, the carburetor is a common subject for aftermarket modifications, including performance kits (e.g., larger jets, upgraded floats, or aftermarket bodies like the Mikuni or Dell Orto clones).

4. **Lower Cost of Ownership**

Compared to modern fuel-injected bikes, the PC-08C reduces the need for expensive diagnostics or repairs related to fuel delivery systems. Issues like clogged injectors, faulty sensors, or ECU glitches are nonexistent. The carburetor s simplicity also means fewer points of failure, which can be cost-effective in the long run, especially if you re not planning to ride the bike aggressively.

5. **Classic Bike Appeal**

For enthusiasts who appreciate the nostalgia and craftsmanship of the 1970s, the PC-08C is a symbol of that era s engineering. The bike s raw, mechanical character including the carburetor can be part of its charm, especially if you re drawn to the simplicity and tactile feedback of throttle response. Restoring or maintaining a bike with a carburetor like this can be a rewarding experience for those who enjoy working with vintage machinery.

6. **Off-Road and Adventure Suitability**

The XL750S was designed as an adventure bike, and the PC-08C carburetor is well-suited for its role. It handles well in varying conditions, including dusty or high-altitude environments, where fuel injection might struggle with clogging or lean mixtures. The mechanical linkage of the carburetor also provides immediate feedback when adjusting the throttle, which can be advantageous for off-road riding.

7. **Easier to Modify for Performance**

If you re looking to increase power, the PC-08C can be upgraded with aftermarket parts such as larger jets, a performance air filter, or a high-flow intake. While these modifications won t yield the same power gains as a modern engine swap, they can be a cost-effective way to improve throttle response and top-end power. Companies like Keihin, Mikuni, and Dell Orto offer aftermarket carburetors that can be bolted onto the XL750S for a more modern feel.

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1. **Sensitivity to Fuel Quality and Altitude**

Carburetors are highly sensitive to the quality of fuel and atmospheric conditions. The PC-08C can be finicky with low-quality gasoline, which may contain more impurities or incorrect octane levels. In high-altitude areas, the carburetor may require frequent adjustments to compensate for thinner air, as the mixture can become too lean. This can lead to rough idling, stalling, or even engine damage if not properly addressed.

2. **Maintenance Requirements**

Unlike fuel-injected systems, carburetors require regular cleaning and maintenance to prevent clogging. The PC-08C has small passages and jets that can become fouled with dirt, varnish, or old fuel. This means you ll need to clean or rebuild the carburetor every few thousand miles or when symptoms like rough idling, hesitation, or poor acceleration appear. Neglecting maintenance can lead to performance issues or even failure.

3. **Less Fuel Efficiency**

Carburetors are generally less fuel-efficient than modern fuel-injected systems, especially when tuned for performance. The PC-08C may not deliver the same mileage as a modern bike, particularly if it s adjusted for higher power output. This can be a drawback if you re planning to use the bike for long-distance touring or if fuel costs are a significant concern.

4. **Throttle Response and Modern Expectations**

The PC-08C carburetor provides a linear power delivery but lacks the instant throttle response and electronic refinements found in modern bikes. This can feel less engaging to riders accustomed to bikes with electronic throttle control, quick spool-up, or progressive power delivery. Some riders may find the carburetor s response sluggish compared to modern standards, especially at low RPMs.

5. **Limited Diagnostic Capabilities**

Diagnosing issues with a carburetor can be more challenging than with a fuel-injected system. Without modern tools like OBD-II scanners or precise fuel pressure gauges, troubleshooting problems like lean mixtures, flooding, or vacuum leaks can be time-consuming and require a deeper understanding of carburetor mechanics. This can be frustrating for riders who prefer quick fixes or lack mechanical expertise.

6. **Environmental and Emissions Concerns**

Carburetors are less efficient in terms of emissions compared to modern fuel-injected systems with catalytic converters and oxygen sensors. If you re riding in areas with strict emissions regulations or plan to use the bike for commuting, you may face challenges with inspections or compliance. While the XL750S was not designed with emissions in mind, some riders modify it with catalytic converters or other emissions control devices to meet local laws.

7. **Potential for Vintage Parts Scarcity**

While the PC-08C is not extremely rare, finding original or high-quality replacement parts can be difficult over time. O-rings, gaskets, and even entire carburetors may become harder to source as the bike ages. This is less of an issue if you re willing to invest in aftermarket parts or rebuild kits, but it can add to the maintenance burden.

8. **Less Comfort for Long-Distance Riding**

The XL750S, with its carburetor and mechanical components, may not offer the same level of refinement or comfort as modern adventure bikes. Vibration, noise, and ergonomics can be less polished, which may make long-distance touring less enjoyable compared to a modern bike with suspension tuning, ergonomic controls, and electronic aids.

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The Keihin PC-08C carburetor is a robust and reliable component that offers a blend of simplicity, tunability, and performance for the 1977 Honda XL750S. It is an excellent choice if you value mechanical integrity, hands-on maintenance, and the classic riding experience. The carburetor s ease of tuning and compatibility with aftermarket parts make it ideal for riders who enjoy customizing their bikes or adapting them to different conditions.

However, the PC-08C is not without its drawbacks. Its sensitivity to fuel quality, higher maintenance requirements, and lack of modern refinements may not appeal to riders seeking convenience, fuel efficiency, or instant throttle response. Additionally, the bike s vintage nature means you ll need to be prepared for occasional part shortages and a less polished riding experience compared to contemporary adventure bikes.

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- You are an enthusiast who appreciates vintage motorcycles and enjoys working on them.

- You prioritize mechanical simplicity, tunability, and the tactile feedback of a carburetor.

- You plan to use the bike for light touring, adventure riding, or as a project bike where you can invest time in maintenance and modifications.

- You are comfortable with the trade-offs in fuel efficiency, emissions, and modern comforts.

- You prefer modern convenience, electronic aids, or minimal maintenance.

- You plan to ride the bike extensively in high-altitude or polluted areas without being prepared for carburetor adjustments.

- You are not willing to invest time in regular carburetor maintenance or troubleshooting.

- You prioritize fuel efficiency, emissions compliance, or long-distance comfort over mechanical authenticity.

For most riders, the PC-08C carburetor is a **strong, characterful choice** that offers a rewarding riding experience for those who embrace the vintage lifestyle. If you re drawn to the XL750S for its adventure capabilities and mechanical charm, the carburetor is a testament to Honda s

Details:

Selling for rebuild or parts. No idea on working condition, any questions feel free to ask.

part #: pc08c prices

• $50.00-$92.97

specifications cyclevintagee:

• for makes: Honda
• for years: 1975-1977
• brand: Keihin
• mpn: Pc-08c
• part type: Carburetor
• machine type: Enduro
• material: Aluminum
• vintage part: Yes
• country of origin: Japan
• placement on vehicle: Front

shipping cyclevintagee:

• transit: 8-12 Days
• service: USPS Ground Advantage
• cost: $7.50
• carrier: USPS
• type: Fixed
• class: Standard

payments cyclevintagee:

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

returns cyclevintagee:

• policy: No Returns

general cyclevintagee:

• condition: For parts or not working
• Parts Accessories > Motorcycle Scooter Parts Accessories > Other Motorcycle Scooter Parts Accessories

offer cyclevintagee:

• options: Ship-to-home
• quantity: 1
• started: May 7, 2026
• availability: In Stock
• sold: 0

seller cyclevintagee:

• # reviews: 180
• city: Durango, Colorado
• rating: 99.4%

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