fits model: Chopper. make: Harley, Davidson.

( Brand: V-twin Manufacturing ), ( Manufacturer Part Number: 31-0640 ), ( Part Type: Fender ), ( Mounting Holes: Pre-drilled ), ( Placement On Vehicle: Rear ), ( Country Of Origin: United States )
The **Harley-Davidson V-Twin 31-0640 Chopper Rigid Fender Brace Set** is a meticulously engineered aftermarket upgrade designed to enhance both the structural integrity and aesthetic appeal of classic Harley-Davidson V-Twin choppers, particularly those featuring rigid fender configurations. Crafted from high-quality, heavy-duty steel, this brace set is built to reinforce the frame s critical load-bearing areas while maintaining the raw, aggressive stance that defines the chopper aesthetic. The 31-0640 set is specifically tailored for the iconic V-Twin engine architecture, ensuring a seamless fit with the bike s inherent geometry whether it s a classic 45, 74, or later-model rigid-fendered chopper. Each brace in the set is precision-machined to match the contours of the frame rails, providing uncompromising rigidity where it matters most: at the headlight and rear fender mounts, the engine cradle, and the swingarm pivot points. Beyond its functional role in stiffening the frame and reducing flex under hard acceleration or aggressive cornering, this brace set also serves as a subtle yet striking visual statement, complementing the bike s stripped-down, minimalist design. The clean, industrial finish blends seamlessly with the raw steel of the frame, avoiding the clunky appearance of aftermarket parts while delivering measurable performance benefits. Whether you re a purist seeking to preserve the chopper s original spirit or a performance enthusiast looking to dial in handling precision, the 31-0640 brace set strikes an ideal balance between heritage and modernity. Installation is straightforward, requiring only basic tools and a keen eye for alignment, making it an accessible yet impactful modification for riders who demand both strength and style.
The **Harley-Davidson V-Twin 31-0640 Chopper Rigid Fender Brace Set** is a popular aftermarket upgrade for chopper-style Harley-Davidsons, particularly for riders who want a more aggressive, low-slung look. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.
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### **Pros**
1. **Enhanced Aesthetics**
The rigid fender brace set dramatically lowers the fenders, creating a more aggressive, chopper-inspired stance. This is ideal for riders who want a custom look that stands out from stock configurations.
2. **Improved Ground Clearance**
By lowering the fenders, the set reduces the risk of scraping the fenders on rough terrain or uneven surfaces, which is especially useful for off-road or backroad riding.
3. **Better Weight Distribution**
The rigid brace setup can help distribute weight more evenly across the frame, potentially improving handling stability, especially at higher speeds or when carrying heavier loads.
4. **Compatibility with Aftermarket Parts**
Many chopper builds incorporate low-rise saddles, custom forks, and other aftermarket components. This brace set integrates well with those modifications, allowing for a cohesive look and function.
5. **Durability**
Harley-Davidson parts, even aftermarket ones, are generally built to last. The brace set is designed to handle the stresses of daily riding, provided it is installed correctly.
6. **Ease of Installation**
Compared to some custom chopper builds, this brace set is relatively straightforward to install, especially for riders with basic mechanical skills or those who visit a shop for installation.
7. **Supports Customization**
The rigid brace set is often used as a foundation for further customization, such as adding custom fenders, skirts, or other aesthetic modifications.
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### **Cons**
1. **Potential Ride Quality Trade-offs**
Lowering the fenders can alter the bike s suspension geometry, potentially leading to a harsher ride or reduced comfort, especially on rough roads. The stock suspension may not be optimized for the lower fender position, requiring additional modifications like lowering springs or shocks.
2. **Clearance Issues with Stock Components**
Some riders report that the lowered fenders can interfere with stock components like the exhaust headers, brake lines, or even the swingarm. Custom routing or modifications may be necessary to avoid rubbing or damage.
3. **Limited Stock Compatibility**
This brace set is designed specifically for chopper builds and may not fit well on bikes that retain stock fenders or other components. Riders with non-chopper builds may find it unnecessary or incompatible.
4. **Cost**
While not excessively expensive, the brace set adds to the overall cost of a chopper build. For riders on a tight budget, this may be a significant investment, especially if additional modifications are needed to make it work properly.
5. **Maintenance Considerations**
Lowered fenders can make it harder to access certain components for maintenance, such as cleaning the fenders, checking tire pressure, or servicing the suspension. Riders may need to be more cautious or invest in additional tools to maintain the bike.
6. **Potential for Improper Installation**
If not installed correctly, the brace set can lead to misalignment, binding, or even damage to the frame or fenders. Poor installation can also affect handling and safety, so professional installation is highly recommended.
7. **Not Universal for All Riders**
The aggressive stance created by this brace set may not appeal to everyone. Riders who prefer a more upright or stock-like riding position may find the look or feel unappealing.
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### **Conclusion**
The **Harley-Davidson V-Twin 31-0640 Chopper Rigid Fender Brace Set** is a solid choice for riders looking to achieve a classic chopper look with improved ground clearance and a more aggressive stance. It excels in aesthetic appeal and functional benefits for chopper builds but requires careful consideration of ride quality, compatibility with other components, and potential additional modifications. For riders who prioritize customization, off-road capability, or a bold visual style, this brace set is a worthwhile investment. However, those who value ride comfort, stock compatibility, or a more conservative build may find it less suitable.
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### **Recommendation**
**Buy the 31-0640 Chopper Rigid Fender Brace Set if:**- You are building or modifying a chopper-style Harley-Davidson and want a lower, more aggressive stance.
- You ride on rough terrain or backroads where ground clearance is a concern.
- You are willing to invest in additional modifications (e.g., suspension tuning, custom fenders) to ensure optimal performance.
- You prefer a custom look and are comfortable with aftermarket parts.
**Avoid the 31-0640 Chopper Rigid Fender Brace Set if:**- You want to keep your bike as close to stock as possible or prefer a more upright riding position.
- You are not planning to make further chopper modifications, as the brace set may not provide significant benefits.
- You are concerned about ride comfort or handling changes without additional suspension work.
- You lack experience with aftermarket modifications and are unsure about installation or compatibility.
For the best results, pair this brace set with professional installation and consider consulting with a custom Harley builder to ensure it integrates seamlessly with your bike s other components.
Check us out online. Please review photos and details please ask any questions. Mount holes measure 5/16 in diameter. Harley-Davidson / Chopper Rigid Fender Brace Set -, Part # 31-0640, New, Braces are 9-1/2 long with raw finish.