1. Antique, Vintage, Historic Motorcycle Parts For Sale
  2. sku: 21151607401457751
  3. HARLEY DAVIDSON 120-331

HARLEY-DAVIDSON 120-331 Vl Front Rear Cylinders Heads

fits make: Harley. year: 1934–1935.

120-331 Harley-davidson Oem Original 1934-1935 Vl Front And Rear Cylinders Heads

( Brand: Harley-davidson ), ( Manufacturer Part Number: 120-331 ), ( Part Type: Cylinder Head ), ( Vintage Part: Yes ), ( Compatible Year: 1933 ), ( Placement On Vehicle: Rear )

Review HARLEY DAVIDSON Oem Original Vl Front And Rear Cylinders Heads fits 1934–1935

The **Harley-Davidson 120-331 1934-1935 V-Twin Cylinder Head Assembly** represents a rare and highly sought-after piece of motorcycle engineering from the golden era of American motorcycle manufacturing. This meticulously crafted component was designed for Harley-Davidson s iconic **120-cubic-inch (2.0L) Flathead V-Twin engine**, which powered some of the most legendary motorcycles of the 1930s, including the **1934-1935 Model 34, 34A, and 34B** machines celebrated for their raw power, durability, and timeless design. The cylinder heads from this era are forged from high-quality **cast iron**, a material known for its strength and resistance to the high temperatures and pressures generated by the engine s combustion process. Each head features a **distinctive V-Twin configuration**, with two vertically opposed cylinders casting a broad, aggressive silhouette that became synonymous with Harley-Davidson s identity. The **intake and exhaust ports** are precisely machined to optimize airflow, ensuring efficient combustion and the characteristic deep, growling exhaust note that enthusiasts still revere today. The **valve springs and guides** are robust, designed to withstand the relentless demands of early motorcycle racing and long-distance touring, while the **spark plug bosses** are strategically positioned for optimal ignition timing. These heads are further distinguished by their **hand-finished surfaces**, including the **fins and cooling ribs** that enhance heat dissipation, a critical feature for engines operating at the limits of their capabilities. The **1934-1935 models** introduced subtle refinements to the earlier Flathead designs, including improved valve geometry and slightly revised porting, which contributed to a more balanced and responsive power delivery. Collectors and restorers prize these cylinder heads not only for their historical significance but also for their **authentic, unaltered construction**, free from the modern modifications that have become commonplace in aftermarket parts. Whether installed in a fully restored classic Harley or used as a centerpiece in a custom engine build, these heads embody the uncompromising craftsmanship and mechanical ingenuity of an era when motorcycles were built to last and to dominate the road. For the true enthusiast, acquiring a genuine **1934-1935 Harley-Davidson 120-331 cylinder head** is more than a mechanical upgrade; it s a tangible connection to the birth of American motorcycle legend.

Buying a 1934 1935 Harley-Davidson VL (120-inch wheelbase, 331 cubic-inch engine) is a significant investment in classic motorcycle history, but it comes with unique challenges and rewards. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Historical Significance and Rarity**

The 1934 1935 VL is one of the most iconic and sought-after Harley-Davidson models, representing the transition between the early "knucklehead" and later "flathead" engines. Its V-twin configuration and distinctive styling make it a prized piece of motorcycle heritage. Ownership of such a machine connects you to a legacy of American engineering and culture.

2. **Engine and Mechanical Heritage**

The 331 cubic-inch V-twin is a robust, air-cooled flathead engine known for its durability and character. When properly maintained, these engines can last decades with minimal modifications. The simplicity of the design no overhead valves, basic carburetion, and mechanical fuel pumps makes it accessible for those interested in vintage motorcycle mechanics.

3. **Classic Aesthetics and Customization Potential**

The VL s design is timeless, with a clean, utilitarian look that appeals to enthusiasts of vintage motorcycles. Its simplicity allows for extensive customization, from paint and chrome work to modern upgrades (e.g., electric starters, modern brakes, or suspension). The bike s lack of modern conveniences also makes it a blank canvas for DIY projects.

4. **Community and Enthusiast Appeal**

Owning a VL grants access to a passionate community of vintage Harley enthusiasts. There are clubs, rallies, and events (such as the Harley-Davidson Vintage Motorcycle Association gatherings) where owners can share knowledge, restoration tips, and camaraderie. This sense of belonging can be incredibly rewarding for those who appreciate the history and craftsmanship of early Harleys.

5. **Potential for Investment**

Well-preserved or restored VLs can appreciate in value over time, especially if they are rare or have historical significance. While they are not typically "investment-grade" like rare cars, some examples have sold for substantial sums at auctions (e.g., $50,000 $100,000 for exceptional specimens). However, this is not guaranteed and depends heavily on condition and provenance.

6. **Riding Experience**

For those who appreciate the raw, unfiltered feel of a vintage motorcycle, the VL offers a different riding experience than modern bikes. The lack of suspension, modern brakes, and ergonomic refinements means the ride is firm and direct, requiring more skill and attentiveness from the rider. This can be exhilarating for those who enjoy the challenge and connection to the machine.

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### **Cons**

1. **High Cost of Acquisition**

Prices for a 1934 1935 VL can range from $20,000 to over $100,000, depending on condition, provenance, and rarity. Even "project" bikes in rough shape can be expensive due to demand. This makes ownership a significant financial commitment upfront.

2. **Maintenance and Restoration Challenges**

These bikes require specialized knowledge and parts. Many components are no longer manufactured, and replacements must be sourced from vintage suppliers, custom machinists, or other enthusiasts. Common issues include:

- **Engine wear**: Flathead engines are prone to valve seat wear, piston ring leakage, and crankshaft issues over time. Rebuilding or restoring one to peak condition can cost $5,000 $15,000 or more.

- **Electrical systems**: Original wiring, generators, and ignition systems are often unreliable and may require modern upgrades (e.g., alternators, electronic ignition).

- **Suspension and brakes**: The original springer forks and drum brakes are inadequate for modern safety standards. Upgrading to modern suspension (e.g., Aermacchi forks) or disc brakes is often necessary but can be costly and complex.

- **Fuel system**: Carburetors (often Amal or Dell Orto) and mechanical fuel pumps are finicky and may require frequent adjustments or replacements.

3. **Lack of Modern Conveniences**

The VL lacks many features modern riders take for granted:

- **No electric starter**: Starting requires a kickstart, which can be difficult in cold weather or for riders with limited strength.

- **Poor ergonomics**: The seat, handlebars, and footpegs are designed for a different riding posture, which may lead to discomfort on long rides.

- **No modern instrumentation**: Speedometers, fuel gauges, and tachometers are often missing or inaccurate. Adding modern gauges requires wiring and mounting work.

- **No modern safety features**: Absent are ABS, traction control, or advanced braking systems, which can be a concern for modern riders.

4. **Reliability and Downtime**

Even with regular maintenance, these bikes are not as reliable as modern motorcycles. Mechanical failures (e.g., seized bearings, cracked heads, or transmission issues) can occur without warning, leading to extended downtime. This is particularly frustrating for riders who want to enjoy their bike regularly.

5. **Insurance and Storage Costs**

Vintage motorcycles often carry higher insurance premiums due to their value and potential repair costs. Additionally, storage (especially climate-controlled) is recommended to protect the bike from rust, moisture, and temperature fluctuations, adding to the ongoing expense.

6. **Legal and Practical Limitations**

- **Registration and compliance**: Some jurisdictions have strict regulations for vintage bikes, requiring originality or specific modifications to pass inspections. Modernizing certain components (e.g., brakes, exhaust) may require additional paperwork or approvals.

- **Riding restrictions**: The VL s lack of modern safety features may make it unsuitable for highway riding in some regions, where higher speeds or longer distances are common.

- **Fuel and emissions**: While not a major issue for most VLs, some states have restrictions on pre-catalytic vehicles, which could require modifications or registration as a "historical" bike.

7. **Time and Skill Investment**

Owning a VL is not just a financial commitment but also a time investment. Restoring, maintaining, or even riding it comfortably often requires learning new skills (e.g., machining, welding, electrical work) or dedicating significant hours to upkeep. For those without mechanical experience or patience, this can be overwhelming.

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### **Conclusion**

The 1934 1935 Harley-Davidson VL is a remarkable machine that embodies the golden age of American motorcycle engineering. It offers unparalleled historical value, customization potential, and a deep connection to vintage motorcycle culture. However, it also demands a substantial financial investment, specialized knowledge, and a willingness to embrace the challenges of owning a pre-war classic.

For the right owner someone who appreciates craftsmanship, enjoys mechanical work, and is prepared for the realities of vintage motorcycle ownership the VL can be an incredibly rewarding experience. It is not, however, a practical or low-maintenance choice for casual riders or those seeking a modern, hassle-free riding experience.

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### **Recommendation**

Buying a 1934 1935 Harley-Davidson VL is best suited for:

- **Enthusiasts** who prioritize history, restoration, and the vintage motorcycle lifestyle over convenience.

- **Mechanically inclined individuals** who enjoy working on their bike and are willing to invest time in maintenance.

- **Collectors or investors** who view the bike as a long-term project or potential appreciation asset, provided they can afford the associated costs.

- **Riders** who appreciate the raw, unfiltered experience of a pre-war motorcycle and are comfortable with its limitations.

**Avoid buying one if:**

- You seek a reliable, low-maintenance motorcycle for daily or frequent use.

- You lack mechanical skills or the patience for extensive restoration work.

- You are not prepared for the high upfront and ongoing costs of ownership.

- You prioritize modern safety, comfort, or convenience features.

**If you decide to pursue a VL:**

1. **Start with a project bike** in reasonable condition to learn the ropes before investing in a fully restored example.

2. **Budget for hidden costs** parts, labor, storage, and insurance can add up quickly.

3. **Join the vintage Harley community** for support, advice, and access to resources.

4. **Prioritize safety upgrades** (e.g., modern brakes, suspension, and instrumentation) even if they compromise originality.

5. **Enjoy the journey** owning a VL is as much about the experience of restoring and riding a piece of history as it is about the bike itself.

Ultimately, the VL is not for everyone, but for those who share its spirit, it can be an unforgettable adventure.

Details:

The product is a set of vintage Harley-Davidson OEM original 1934-1935 VL front and rear cylinders heads. Specifically, it includes the part numbers 120-331 and 120-30, designed to fit a 1933 compatible year motorcycle. This obviously will need blasting and they the chrome bits are fried. There are only three lifters.

Selling is a set for Restoration.

specifications cyclevintagee:

  • for makes: Harley
  • for years: 1934-1935
  • brand: Harley-davidson
  • mpn: 120-331
  • part type: Cylinder Head
  • vintage part: Yes
  • compatible year: 1933
  • placement on vehicle: Rear

returns cyclevintagee:

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

seller cyclevintagee:

  • rating: 99.4%
  • city: Louisville, Kentucky
  • # reviews: 6480

offer cyclevintagee:

  • availability: In Stock
  • quantity: 1
  • options: Ship-to-home
  • sold: 0
  • started: March 14, 2026

shipping cyclevintagee:

  • type: Calculated
  • class: Standard
  • cost: $107.72
  • carrier: UPS
  • service: UPS Ground
  • transit: 3-6 Days

general cyclevintagee:

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

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for makes: harley, for years: 1934-1935, part type: cylinder head, vintage part: yes, compatible year: 1933, placement on vehicle: rear,
category: motorcycle parts > motorcycle scooter parts accessories, sku: 21151607401457751,
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