fits model: 900, Ironhead, Sportster. make: Harley.

( Manufacturer Part Number: 16681-57 ), ( Part Type: Cylinder Head ), ( Placement On Vehicle: Front )
The 57-71 16681-57 Harley-Davidson XL cylinder heads are an essential component of the iconic Ironhead Sportster engine, specifically model years 1957 to 1971. These heads are known for their robustness and reliability, making them a popular choice among vintage Harley enthusiasts and restorers.
The 16681-57 cylinder heads are cast from high-quality iron and feature a single overhead camshaft (SOHC) design, which was a significant departure from Harley's traditional side-valve engines. The SOHC design allowed for improved engine performance, with smoother operation, better fuel efficiency, and increased power output.
The intake and exhaust ports on these heads are generously sized, allowing for optimal air and fuel flow. The intake ports are shaped to provide a high-velocity charge to the combustion chamber, while the exhaust ports are designed to efficiently expel spent gases. The cylinder heads also feature large, heat-resistant valves and chambered combustion chambers, which contribute to improved combustion efficiency and power delivery.
The 57-71 16681-57 Harley-Davidson XL cylinder heads are designed to fit seamlessly into the Ironhead Sportster engine, with precision-machined surfaces and accurate bolt patterns. They are also available in a variety of finishes, including polished, chrome-plated, and black powder-coated, allowing you to customize the appearance of your engine to match your personal style.
In summary, the 57-71 16681-57 Harley-Davidson XL cylinder heads are a high-quality, reliable, and essential component of the classic Ironhead Sportster engine. Their robust design, SOHC configuration, and large intake and exhaust ports contribute to improved engine performance, while their precision-machined surfaces and variety of finishes allow for customization options to match your style.
Pros of buying 57-71 Harley-Davidson XL Cyclemaster (Ironhead Sportster) with 900cc heads (model numbers 16681-57 and 16683-57):1. Classic Appeal: The Ironhead Sportster is a timeless classic, and owning one is a great way to be part of Harley-Davidson's rich history.
2. Affordability: Compared to newer models, these classic bikes are often more affordable to purchase, maintain, and insure.
3. Simplicity: These bikes have fewer electronic components, making them easier to work on and maintain.
4. Community: Owning a classic Harley-Davidson often means joining a large and passionate community of enthusiasts.
5. Unique Experience: Riding a classic bike is a different experience than riding a modern one. The sound, feel, and overall riding experience can be quite enjoyable.
Cons of buying 57-71 Harley-Davidson XL Cyclemaster (Ironhead Sportster) with 900cc heads (model numbers 16681-57 and 16683-57):1. Limited Features: Compared to modern bikes, classic bikes like the Ironhead Sportster have fewer features, such as ABS, fuel injection, and cruise control.
2. Performance Limitations: Due to their simpler design and smaller engines, classic bikes may not have the same performance capabilities as modern motorcycles.
3. Maintenance Requirements: Classic bikes often require more frequent maintenance than modern bikes due to the lack of modern engine management systems.
4. Availability of Parts: Finding replacement parts for classic bikes can be more challenging than for newer models, as they are no longer in production.
5. Insurance Costs: Although these bikes may be cheaper to purchase, the cost of insuring them can be higher due to their value and the fact that they are more vulnerable to theft.
Conclusion:The 57-71 Harley-Davidson XL Cyclemaster (Ironhead Sportster) with 900cc heads is a great choice for those who appreciate classic motorcycles and are looking for an affordable and unique riding experience. While it may have some limitations compared to modern bikes, the classic appeal, simplicity, and community are strong selling points. However, potential buyers should be aware of the maintenance requirements, limited features, availability of parts, and potential higher insurance costs.
Recommendation:If you are considering buying a 57-71 Harley-Davidson XL Cyclemaster (Ironhead Sportster) with 900cc heads, it is recommended to do thorough research on the bike's history, condition, and maintenance requirements. It's also a good idea to join a local Harley-Davidson club or forum to learn more about the bike and connect with other enthusiasts. Additionally, it may be wise to invest in a reputable mechanic who specializes in classic bikes to ensure the bike is in good working order before making a purchase.
This part may fit other years and model's. No broken fins. Threads are good. Excellent condition as seen in images.
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