CUSTOM CHROME 46-231 Rocker Engine Big Twin/sportster

( Brand: Custom Chrome ), ( Manufacturer Part Number: 46-231 ), ( Type: Rocker Box Set Conplete )

Review CUSTOM CHROME Rocker Boxes Harley Davidson Engine Big Twin/sportster fits EVO TWIN SPORTSTER

The **Harley-Davidson 46-231 Rocker Assembly** is a precision-engineered component designed exclusively for the iconic **EVO engine** found in Harley-Davidson s legendary **Big Twin** and **Sportster** models, ensuring optimal performance, reliability, and throttle response. Crafted from high-grade **forged steel** and meticulously machined to Harley-Davidson s exacting specifications, this rocker assembly plays a critical role in the engine s valve actuation system. The unit features a **dual-rocker design**, where each intake and exhaust valve is operated by a dedicated rocker arm, allowing for precise control over valve lift and duration. This setup enhances engine breathing, particularly at higher RPMs, delivering improved airflow and power output while maintaining smooth, responsive throttle modulation. The rocker arms are treated with a **durable chrome plating** to resist wear and corrosion, ensuring longevity even under demanding conditions, such as high-performance riding or extended use in varied climates. Compatible with Harley-Davidson s **EVO camshafts**, this rocker assembly is engineered to work seamlessly with the engine s pushrod system, providing the necessary leverage to open and close the valves with minimal friction. Whether installed in a classic **Sportster 883/1200** or a powerful **Big Twin** like the **Heritage Classic or Road Glide**, this component is essential for preserving the engine s performance characteristics while reducing the risk of premature wear on the camshaft lobes and valve stems. Built to Harley-Davidson s rigorous standards, the **46-231 Rocker Assembly** is a must-have upgrade for riders seeking to restore factory performance, enhance engine efficiency, or address symptoms of wear in an aging EVO engine. Its straightforward installation requiring only basic tools and a clean workspace makes it an accessible yet high-impact modification for both DIY enthusiasts and professional mechanics. By maintaining the integrity of the valve train, this rocker assembly contributes to a smoother ride, better fuel economy, and the enduring spirit of Harley-Davidson s legendary V-twin power.

The **46-231 Rocker** is a popular aftermarket camshaft for Harley-Davidson engines, particularly the **Evo Big Twin (1984 2004)** and **Sportster (1999 2004)** platforms. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the 46-231 Rocker Camshaft**

1. **Improved Low-End Torque**

The 46-231 is designed to enhance low-end power, making the engine feel more responsive at lower RPMs. This is particularly beneficial for cruisers and Sportsters, where smooth acceleration is desirable.

2. **Better Throttle Response**

Many stock Harley engines suffer from a sluggish mid-range. The 46-231 helps bridge this gap, providing a more linear power delivery rather than a peak-heavy curve.

3. **Retains Stock Feel with Modifications**

Unlike more aggressive cams that can make an engine feel "loose" or "peppy," the 46-231 offers a balanced improvement. It doesn t require drastic fuel or ignition tuning to run well, making it a more forgiving choice for stock or lightly modified engines.

4. **Works Well with Stock Components**

This cam is designed to be compatible with stock carburetors (e.g., 750/883/1200 carbureted engines) and ignition systems, though some adjustments (like slightly richer jetting) may be needed for optimal performance.

5. **Popular in the Aftermarket**

The 46-231 is widely used and well-documented, meaning parts, tuning guides, and support are readily available. This makes it easier to troubleshoot and maintain.

6. **Good for Street and Light Cruising**

If you primarily ride on highways or in stop-and-go traffic, the 46-231 provides a noticeable improvement in daily drivability without sacrificing reliability.

7. **Lower Cost Compared to Aggressive Cams**

Relative to more extreme cams (e.g., 48-231 or 50-231), the 46-231 is more affordable, making it a cost-effective way to enhance performance.

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### **Cons of the 46-231 Rocker Camshaft**

1. **Limited High-RPM Power**

The 46-231 is not a high-revving cam. While it improves low-end and mid-range, it does not significantly boost top-end power. If you re looking for a cam that makes the engine feel "hot" at high RPMs, this is not it.

2. **May Require Minor Tuning**

While it runs well with stock setups, some riders report needing slight adjustments to carburetion (e.g., richer jetting) or ignition timing to avoid hesitation or rough idle. This is more noticeable on carbureted engines.

3. **Not as Aggressive as Other Options**

If you re aiming for a more "peppy" or sporty feel, the 46-231 is relatively mild. More aggressive cams (like the 48-231 or 50-231) will provide a more noticeable power bump but may require more tuning and maintenance.

4. **Potential for Increased Oil Consumption**

Like most aftermarket cams, the 46-231 may increase oil consumption slightly, especially if the engine is already running on the edge of stock tolerances. Regular oil checks are recommended.

5. **Not Ideal for Heavy Modifications**

If you plan to add a supercharger, turbo, or significant cylinder head work, the 46-231 is a starting point but may need to be paired with a more aggressive cam later. It s better suited for stock or lightly modified engines.

6. **Mixed Reviews on Throttle Bump**

Some riders notice a slight "throttle bump" (a brief hesitation when opening the throttle) at low RPMs, though this is often resolved with minor tuning. Others don t experience this issue.

7. **Limited Longevity on Older Engines**

Harley-Davidson Evo engines are known for their durability, but pushing them with an aftermarket cam even a mild one like the 46-231 can accelerate wear if maintenance is neglected. Regular valve adjustments and oil changes are critical.

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### **Conclusion**

The **46-231 Rocker camshaft** is an excellent choice for riders looking to enhance their Harley s low-end and mid-range power without drastic modifications. It strikes a balance between performance and practicality, making it ideal for daily riding, cruising, and light street use. However, it is not a high-revving or aggressive cam, so it may not satisfy those seeking a more "hot" engine feel.

If your primary goal is **smoother acceleration, better throttle response, and a more refined power delivery** especially on a stock or lightly modified Evo Big Twin or Sportster this cam is a solid investment. It s also a great starting point if you plan to experiment with other modifications later.

For riders who want **more aggressive power, higher RPM potential, or a sportier feel**, a cam like the **48-231 or 50-231** might be a better fit, though these require more tuning and maintenance. If you re on a budget or want a subtle but noticeable improvement, the 46-231 is a reliable and well-supported choice.

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### **Recommendation**

- You want a **mild but effective** performance boost for daily riding.

- Your engine is **stock or lightly modified** (carbureted or early fuel-injected).

- You prioritize **low-end torque and throttle response** over high-RPM power.

- You prefer a **forgiving cam** that doesn t require extensive tuning.

- You want **more aggressive power** and are willing to tune the engine accordingly.

- Your engine is **heavily modified** (e.g., with a supercharger or significant cylinder work).

- You plan to **rev the engine frequently** or ride aggressively.

**Final Verdict:** The 46-231 is one of the best **all-around mild cams** for Harley-Davidson Evo engines, offering a practical and noticeable improvement without sacrificing reliability. It s a great choice for riders who want more power from their bike without overcomplicating things.

Details:

These are in good condition will fit Evolution big Twins and Sportster 86-2003 Chrome is overall with some scratch, could use a cleaning. The Custom Chrome Rocker Boxes are designed specifically for Harley Davidson EVO engines, including both Big Twin and Sportster model's. The hanks for looking. This complete set includes the necessary components to enhance performance and appearance of your motorcycle.

part #: 46231 prices

• $1299.95-$8685.07

specifications bearingmotorcycleiz:

• for models: Evo, Twin, Sportster
• for makes: Harley, Davidson
• brand: Custom Chrome
• mpn: 46-231
• type: Rocker Box Set Conplete

shipping bearingmotorcycleiz:

• cost: $13.83
• carrier: USPS
• class: Standard
• service: USPS Ground Advantage
• type: Calculated
• transit: 5-12 Days

payments bearingmotorcycleiz:

• money order
• wallet: Apple-pay
• other
• credit card: Diners-club

offer bearingmotorcycleiz:

• sold: 0
• started: March 27, 2026
• options: Ship-to-home
• best offers: True
• quantity: 1
• availability: In Stock

returns bearingmotorcycleiz:

• policy: No Returns

general bearingmotorcycleiz:

• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Engine Bearings
• condition: Used

seller bearingmotorcycleiz:

• city: Virginia Beach, Virginia
• rating: 98.8%
• # reviews: 92

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