HARDDRIVE MN-Y337 Intake Clamp Set Rider MN/Y337
fits model: Fxs, Pr. make: Harley, Davidson. year: 1977–1978.
( Brand: Harddrive ), ( Manufacturer Part Number: MN/Y337 ), ( Compatible Year: 1978 1977 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Fxs Low Rider ), ( Bundle Description: 1 Pc Genuine Harddrive Intake Clamp Set ), ( Type: Intake Clamp Set ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )
Review HARDDRIVE Mn/y337 Intake Clamp Set Harley Davidson Low Rider fits FXS PR 1977–1978
The **MN/Y337 Intake Clamp Set** is a meticulously crafted, high-performance accessory designed exclusively for the iconic 1977 1978 Harley-Davidson FXS rider, ensuring a seamless and secure connection between the air intake system and the engine s intake manifold. Engineered with precision and built to withstand the demands of high-revving Big Twin power, this clamp set features a robust, heat-resistant construction that guarantees long-lasting durability while maintaining optimal airflow efficiency. The design incorporates a tight, interference-free fit, eliminating any potential for leaks or vibrations that could compromise performance or disrupt the smooth operation of the engine s intake tract. Whether you re cruising down the open highway or pushing the limits at the track, these clamps provide a reliable, no-compromise solution for maintaining peak engine performance and intake integrity. Perfect for both stock and modified setups, the MN/Y337 Intake Clamp Set is a must-have upgrade for any FXS enthusiast seeking to preserve the integrity of their intake system while enhancing the overall driving experience.
The **Harddrive MN/Y337 Intake Clamp Set** is a popular aftermarket modification for 1977-1978 Harley-Davidson FXS/Rider models, designed to improve airflow and performance. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.
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### **Pros of the Harddrive MN/Y337 Intake Clamp Set**
1. **Enhanced Airflow and Performance**
The primary benefit is improved airflow into the carburetor, which can lead to better throttle response, smoother power delivery, and a slight increase in horsepower. This is particularly noticeable in stock or lightly modified engines where airflow restrictions are a limiting factor.
2. **Easier Installation**
Unlike some aftermarket intake systems that require significant modifications (such as cutting or welding), the Harddrive clamp set is designed to bolt onto the stock intake manifold with minimal effort. It retains the stock carburetor (typically a Holley or Amal) while enhancing its performance.
3. **Retains Stock Components**
Since the clamp set works with the existing carburetor and intake manifold, it avoids the need for costly upgrades like new carburetors or manifolds. This makes it a cost-effective solution for riders who want incremental gains without a full rebuild.
4. **Minimal Tuning Required**
Unlike aggressive modifications that may require extensive tuning (e.g., ECU reprogramming or fuel system adjustments), the Harddrive clamp set often works well with stock settings or minor carburetor adjustments. This reduces the risk of running rich or encountering drivability issues.
5. **Durability and Reliability**
Harddrive is a well-regarded brand in the Harley-Davidson aftermarket, known for producing high-quality, durable components. The clamp set is typically made from sturdy materials and designed to withstand the stresses of daily riding.
6. **Aesthetic Appeal**
The clamp set often includes polished or chromed components that can improve the look of the engine bay, especially if paired with other performance upgrades. Some riders appreciate the cleaner, more streamlined appearance it provides compared to stock rubber hoses.
7. **Backward Compatibility**
The design is specifically tailored for the 1977-1978 FXS/Rider, ensuring a proper fit without the need for adapters or modifications to the stock setup.
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### **Cons of the Harddrive MN/Y337 Intake Clamp Set**
1. **Limited Performance Gains**
While the clamp set improves airflow, the gains are modest compared to more aggressive modifications (e.g., a full intake manifold swap, high-performance carburetor, or porting the cylinder heads). Expect noticeable but not dramatic improvements, especially on heavily modified engines.
2. **Potential for Fuel System Strain**
Increased airflow can lead to a leaner mixture if the carburetor is not properly adjusted. This may result in rough idle, hesitation, or even engine damage if the fuel system cannot keep up. Riders must be prepared to tune the carburetor (e.g., adjusting jets or float levels) to avoid issues.
3. **Not a Standalone Solution**
The clamp set is not a "set it and forget it" modification. For optimal results, it should be paired with other upgrades (e.g., a performance exhaust, headers, or a high-flow air cleaner) to fully realize its potential. On its own, the gains may be subtle.
4. **Compatibility with Aftermarket Intakes**
If the rider later installs an aftermarket intake (e.g., a full aluminum manifold), the Harddrive clamp set may become redundant or even interfere with the new setup. This could lead to unnecessary expense if plans change.
5. **Minor Installation Challenges**
While easier than some modifications, the clamp set still requires careful installation to ensure a proper seal and avoid leaks. Improper installation (e.g., overtightening or misalignment) could damage the intake manifold or carburetor gaskets.
6. **Cost Relative to Other Upgrades**
At around $100 $150, the clamp set is affordable, but it represents a small fraction of the cost of more impactful modifications (e.g., a full intake manifold swap or cylinder head porting). Riders seeking significant power gains may find it a modest investment.
7. **Potential for Backfiring**
Increased airflow can sometimes cause backfiring at the carburetor, especially under hard acceleration. This is usually resolved with carburetor tuning but can be annoying if not addressed promptly.
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### **Conclusion**
The **Harddrive MN/Y337 Intake Clamp Set** is a practical and relatively low-risk modification for 1977-1978 FXS/Rider owners who want to enhance airflow and throttle response without a major overhaul. It strikes a balance between ease of installation, cost-effectiveness, and performance gains, making it suitable for riders who have already invested in other stock or mild aftermarket upgrades.
However, it is not a "miracle fix" and should be viewed as one piece of a broader performance strategy. The real benefits smoother power delivery and better mid-range response are most apparent when paired with complementary upgrades like a high-flow air cleaner or exhaust system. Riders must also be prepared to tune the carburetor to avoid fueling issues.
For those who want incremental improvements without the complexity of a full engine rebuild, the Harddrive clamp set is a solid choice. But if the goal is significant horsepower gains, more aggressive modifications (e.g., a full intake manifold, ported heads, or a high-performance carburetor) would be necessary.
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### **Recommendation**
**Buy the Harddrive MN/Y337 Intake Clamp Set if:**- You want a simple, affordable way to improve airflow and throttle response on your 1977-1978 FXS/Rider.
- You ve already upgraded other components (e.g., exhaust, air cleaner) and want to further optimize performance.
- You re comfortable with minor carburetor tuning to match the increased airflow.
- You appreciate the aesthetic benefits of a cleaner intake setup.
**Avoid or Consider Alternatives if:**- You re seeking dramatic power gains and are willing to invest in more extensive modifications.
- You plan to install an aftermarket intake manifold in the future, as the clamp set may become unnecessary.
- You re unsure about tuning the carburetor and want a plug-and-play solution (in which case, a full intake manifold swap might be better).
- Your engine is heavily modified or runs rich stock, as the clamp set could exacerbate fueling issues without proper adjustments.
**Final Verdict:**The Harddrive MN/Y337 Intake Clamp Set is a **highly recommended upgrade** for riders looking for a straightforward, effective way to enhance their FXS/Rider s performance. It s particularly well-suited for those who want to avoid major modifications while still enjoying noticeable improvements in airflow and drivability. Pair it with other complementary upgrades (e.g., a high-flow air cleaner or exhaust) for the best results.
Details:
HardDrive Intake Clamp Set for 1977-1978 Harley Davidson FXS Low Rider - Pr: Status: In Stock.
part #: mny337 price
- $36.37
specifications intakefuelmotorcycle:
- for models: Fxs, Pr
- for makes: Harley, Davidson
- for years: 1977-1978
- brand: Harddrive
- mpn: Mn/y337
- compatible year: 1978 1977
- compatible make: Harley Davidson
- compatible model: Fxs Low Rider
- bundle description: 1 Pc Genuine Harddrive Intake Clamp Set
- type: Intake Clamp Set
- core charge: Free No Core Charge
- fitment type: Direct Replacement
seller intakefuelmotorcycle:
- rating: 99.2%
- # reviews: 23111
- city: Multiple warehouses
general intakefuelmotorcycle:
- condition: New
- Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery
shipping intakefuelmotorcycle:
- type: Fixed
- transit: 4-6 Days
- service: Standard
- class: Standard
- cost: $0.00
returns intakefuelmotorcycle:
- policy: Returns Accepted
- time: 30 Days
- paid by: Seller
offer intakefuelmotorcycle:
- sold: 0
- started: May 22, 2026
- quantity: 1
- options: Ship-to-home
- availability: In Stock
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