Vortex Racing Aluminum Rear Sprocket 520 47 Tooth- Black - 775AZK-47

The Vortex Racing Aluminum Rear Sprocket 520 47 Tooth Black (Part # 775AZK-47) is a high-quality aftermarket rear sprocket engineered for motorcycles running a 520 chain pitch. Manufactured from aluminum to precise specifications, this sprocket is designed to deliver consistent concentricity, reliable durability, and a meaningful reduction in rotating mass — qualities that matter whether you're chasing lap times on the track or simply upgrading your street bike's drivetrain. At $81.98, it represents a performance-focused drivetrain component from one of the most respected names in motorcycle sprocket manufacturing.

Key Features & Benefits

• Precision Aluminum Construction: Made to exact specifications from aluminum, ensuring true concentricity with every rotation. Proper concentricity reduces vibration and chain wear, extending the life of your entire drivetrain.
• Lightening Holes Reduce Rotating Mass: Strategic lightening holes are machined into the sprocket body, cutting unsprung and rotating weight. Less rotating mass means quicker throttle response and improved acceleration feel — a noticeable difference for performance-oriented riders.
• 520 Chain Pitch Compatibility: Designed specifically for 520-pitch chains, a common specification on sport, supersport, and track-converted motorcycles. Ensures proper chain engagement and smooth power transfer.
• 47-Tooth Configuration: A 47-tooth rear sprocket provides a longer overall gear ratio compared to smaller tooth counts, which can improve low-end torque and acceleration at the cost of slightly lower top speed — a popular choice for riders who want stronger mid-range pull or who ride in tight, technical environments.
• Black Finish: The black finish provides a clean, aggressive aesthetic that complements a wide range of motorcycle styles and color schemes.
• Vortex Racing Engineering: Vortex Racing is a well-known brand in the motorcycle performance and racing community, recognized for producing drivetrain components built to consistent quality standards.

Specifications

• Brand: Vortex Racing
• Part Number (MPN): 775AZK-47
• SKU: VTX775AZK-47
• Chain Pitch: 520
• Tooth Count: 47 teeth
• Material: Aluminum
• Color/Finish: Black
• Sprocket Type: Rear

Fitment

The Vortex Racing 775AZK-47 is a rear sprocket designed for motorcycles that use a 520-pitch chain. The specific bolt pattern, center bore, and carrier compatibility are determined by the 775 carrier code in the part number, which is Vortex Racing's designation for the particular hub/carrier configuration this sprocket is built for. Because Vortex Racing uses a model-specific carrier numbering system, it is critical to verify that the 775 carrier code matches your specific motorcycle make, model, and year before purchasing.

If you are unsure whether this sprocket fits your bike, our fitment specialists are available to confirm compatibility before you order. Do not assume fitment based on tooth count or chain pitch alone — the carrier pattern must also match. Contact us via the fitment help button or call our team directly.

What's in the Box

This listing includes the Vortex Racing 775AZK-47 aluminum rear sprocket (47-tooth, 520-pitch, black). Hardware and chain are not included unless otherwise noted. Always verify that your existing chain and front sprocket are compatible with a 520-pitch setup before installing.

Why Buy from ThreePiece.us

• Free Shipping: Every order ships free — no minimum purchase required.
• Affirm Financing: Split your purchase into manageable payments with Affirm financing available at checkout, so you can upgrade your drivetrain now without waiting.
• Expert Fitment Support: Our team has served 10,000+ customers and is available to help verify that this sprocket is the right carrier fit for your specific motorcycle. Reach us at 813-535-5801 or via email at [email protected].
• In-Stock Availability: The 775AZK-47 is a regularly stocked product, meaning you won't face the long lead times associated with special-order parts.
• Price Match Guarantee: Found it for less? We offer a price match guarantee on all products.

Frequently Asked Questions

Q: What chain pitch does this sprocket use?

A: The Vortex Racing 775AZK-47 is designed for a 520-pitch chain. Make sure your front sprocket and chain are also 520-pitch to ensure proper compatibility and safe operation.

Q: How do I know if the 775 carrier fits my motorcycle?

A: The "775" in the part number refers to Vortex Racing's specific carrier/hub code for this sprocket. This code corresponds to a particular bolt pattern and center configuration. Because fitment varies by make, model, and year, we strongly recommend contacting our fitment team at 813-535-5801 or using the fitment help tool on this page to confirm this sprocket is correct for your bike before ordering.

Q: Is this sprocket in stock and ready to ship?

A: Yes — the 775AZK-47 is listed as a regularly stocked product at ThreePiece.us. It is not a special-order item, so standard processing and shipping timelines apply. All orders include free shipping.

Q: Will installing a 47-tooth rear sprocket affect my top speed or acceleration?

A: Changing your rear sprocket tooth count does affect your overall gear ratio. A larger rear sprocket (more teeth) effectively shortens your gearing, which typically improves low-end acceleration and mid-range torque but may reduce maximum top speed. Whether 47 teeth is the right choice depends on your current sprocket size and how you use your bike — our team can help talk through the trade-offs if you have questions.