BSA 42-6018 Brake Drum Sprocket Qd Hub 46T 2/1 BG5330/267

( Brand: Bsa ), ( Manufacturer Part Number: 42-6018 ), ( Type: Wheel Hub ), ( Quick Detatch Hub: 37-6114 ), ( Smiths Motor Association Speedometer: Bg5330/267 ), ( Smiths: 529397 ), ( Vintage Part: Yes ), ( Country Of Origin: United Kingdom ), ( Placement On Vehicle: Rear Wheel )

Review BSA Gold Brake Drum Sprocket 46t Qd Hub Speedo 2/1 Bg5330/267 fits ROCKET STAR A10

The **BSA 42-6018 Rocket Star A10 Brake Drum Sprocket (46T, Quick-Release Hub, BG5330/267)** is a meticulously engineered component designed to deliver both performance and reliability for classic and modern off-road motorcycles, particularly those built on the iconic Rocket Star A10 chassis. This high-quality sprocket is crafted to replace the stock brake drum assembly, ensuring seamless integration with the rear wheel hub while maintaining optimal braking efficiency and drivetrain synchronization. The **46-tooth (46T) configuration** strikes an ideal balance between acceleration and top-speed capability, making it a versatile choice for riders seeking a refined yet spirited riding experience. Engineered with precision, the sprocket features a **quick-release (QD) hub interface**, allowing for effortless installation and removal without the need for specialized tools, which is particularly advantageous for riders who frequently swap out wheels or perform maintenance on their own. The **BG5330/267 compatibility** ensures a perfect fit for the Rocket Star A10 s rear axle, aligning flawlessly with the brake drum and hub assembly to prevent slippage or misalignment during use. Constructed from durable, heat-treated steel, this sprocket is built to withstand the rigors of off-road riding, including rough terrain, heavy loads, and prolonged exposure to the elements, while minimizing wear on the chain and sprocket teeth. Whether used for daily commuting, trail riding, or competitive off-roading, this component enhances both the functionality and longevity of the motorcycle s drivetrain, providing riders with confidence in their bike s performance. Its robust design and compatibility with aftermarket upgrades further solidify its reputation as a must-have replacement for enthusiasts looking to optimize their Rocket Star A10 s handling and power delivery.

### **Pros and Cons of buying a BSA 42-6018 Rocket Star A10 Brake Drum Sprocket (46T QD Hub, BG5330/267)**

1. **Compatibility** This part is specifically designed for the **BSA Rocket Star A10** model, ensuring a proper fit for the brake drum, sprocket, and quick-release (QD) hub. This reduces the risk of misalignment or performance issues that can arise with aftermarket parts meant for other bikes.

2. **High-Quality Materials** BSA (British Steel) parts are known for durability, especially in drivetrain components. The sprocket is likely made from hardened steel, which resists wear and extends the life of the chain and other drivetrain parts.

3. **Direct Replacement** Since this is an **OEM (Original Equipment Manufacturer) or genuine BSA part**, it should function identically to the original component, maintaining the bike s intended performance and handling.

4. **Reliability** BSA has a long-standing reputation for building robust, long-lasting motorcycle components. This part is less likely to fail prematurely compared to cheaper, unknown brands.

5. **Ease of Installation** The **46-tooth sprocket** and **QD (quick detach) hub** design make it relatively straightforward to install, even for those with basic mechanical skills. No special tools are typically required beyond a chain breaker and a sprocket removal tool.

6. **Chain Wear Reduction** A properly fitted sprocket helps distribute wear more evenly across the chain, potentially extending its lifespan if maintained correctly.

7. **Resale Value** Keeping the bike stock or using genuine parts can help maintain its value if you ever decide to sell it.

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1. **Cost** Genuine BSA parts are often more expensive than aftermarket alternatives. While this ensures quality, it may be a significant investment if multiple components need replacement.

2. **Limited Availability** BSA parts, especially for older or less common models like the Rocket Star A10, may not be as widely stocked as mass-produced aftermarket parts. You might need to order from specialty suppliers or wait for delivery.

3. **Potential Overkill for Some Riders** If you primarily ride lightly (e.g., short commutes, low speeds), a 46-tooth sprocket may be slightly larger than necessary, which could slightly reduce top-end acceleration. However, this is a minor trade-off for durability.

4. **Weight** Steel sprockets are heavier than some aluminum aftermarket options. While the difference is small, it may contribute to slightly higher rotational mass, affecting acceleration in some cases.

5. **Chain Maintenance Requirements** A larger sprocket (like the 46T) can increase chain wear if not paired with a properly sized front sprocket. You may need to adjust your front sprocket or chain length to avoid excessive wear.

6. **No Customization Options** Unlike aftermarket sprockets, this is a fixed-size part. If you want to experiment with gearing (e.g., for better hill climbing or highway performance), you d need to replace it with a different tooth count.

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### **Conclusion**

The **BSA 42-6018 Rocket Star A10 brake drum sprocket (46T QD hub, BG5330/267)** is a **high-quality, reliable, and compatible** replacement part for your bike. It offers the advantage of **durability, proper fitment, and OEM-level performance**, making it an excellent choice if you prioritize longevity and authenticity. However, the **higher cost and limited availability** may be drawbacks for some riders.

If your primary concerns are **reliability, ease of installation, and maintaining the bike s original specifications**, this is a strong recommendation. If you re looking for **cost savings or customization options**, you might consider aftermarket alternatives but be sure they meet BSA s specifications to avoid compatibility issues.

- You want a **direct, high-quality replacement** for your BSA Rocket Star A10.

- You prioritize **durability and long-term reliability** over cost savings.

- You re comfortable paying a premium for **OEM-level performance**.

- You re on a tight budget and can find a **high-quality aftermarket sprocket** that fits perfectly.

- You plan to **modify your gearing** and need a different tooth count.

- You prefer **lighter weight** and are willing to accept slightly less brand assurance.

For most riders who value **authenticity and build quality**, this BSA part is a **solid choice**. Just ensure you also check the **chain and front sprocket** to maintain optimal drivetrain performance.

Details:

History of use is unknown. Scratches, scuffs. Up for your consideration is an original. Smiths Motor Association Speedo.

Please let me know if you would like more measurements, photos, etc. 2:1 Ratio BG5330/267. Even OLD PARTS Deserve a New Life. As shown in photos.

Surface rust. Rear Brake Drum 46T Sprocket. Please verify your bike can use this part before purchasing.

Please zoom-in on photos to see detailed look.

part #: 426018 prices

• $139.95-$425.00

specifications wheehucyc:

• for models: A10, Rocket, Star
• brand: Bsa
• mpn: 42-6018
• type: Wheel Hub
• quick detatch hub: 37-6114
• smiths motor association speedometer: Bg5330/267
• smiths: 529397
• vintage part: Yes
• country of origin: United Kingdom
• placement on vehicle: Rear Wheel

offer wheehucyc:

• availability: In Stock
• started: March 2, 2026
• quantity: 1
• sold: 0
• best offers: True
• options: Ship-to-home

returns wheehucyc:

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

seller wheehucyc:

• rating: 100.0%
• # reviews: 2672
• city: Riverside, California

payments wheehucyc:

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

shipping wheehucyc:

• class: Standard
• transit: 3-7 Days
• service: Standard
• type: Fixed
• cost: $15.00

general wheehucyc:

• condition: Used
• Motorcycle Scooter Parts Accessories > Wheels, Tires Parts > Wheel Hubs

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