Renthal Ultralight Rear Sprocket (Silver, 40T) 437U-520-40GBSI - Yamaha Raptor 700R / YFZ450 2004-2026

Product Description

Maximize your power transfer and reduce unsprung weight on your quad with the Renthal Ultralight Rear Sprocket. Engineered specifically for high-performance ATV riding, this sprocket delivers professional-grade durability without adding unnecessary mass to your rear axle.

Manufactured from a specially enhanced 7075-T6 aluminum alloy, these sprockets are precision CNC-machined to tight tolerances. Featuring self-cleaning mud grooves and a computer-aided ultra-light design, they drop weight significantly compared to stock steel components while maintaining exceptional tensile strength.

Top Features: Renthal Ultralight Rear Sprocket

• CNC-machined from a specially enhanced 7075-T6 aluminum alloy for ultimate strength.
• Integrated self-cleaning mud grooves at each tooth to help increase wear resistance.
• Ultralight design makes them 66 percent lighter than steel without sacrificing durability.
• Engineered specifically for a 520 chain size to ensure optimal power transfer.

Please review the detailed compatibility data below to ensure an exact fitment match for your quad before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Is this sprocket significantly lighter than a steel stock unit?
A: Yes, the ultralight aluminum design is 66 percent lighter than standard steel sprockets to reduce rotating mass.

Q: What chain size does this sprocket require?
A: This sprocket is designed to fit a 520 chain size.

Expert Pro-Tip

Expert Pro-Tip: Always inspect your axle carrier bearings and chain sliders when swapping out sprockets on an ATV. Worn chain sliders or a loose carrier will cause rapid, uneven tooth wear on a brand-new aluminum sprocket.

Recommended Pairings:

• MX Chains
• Yamaha Raptor 700R Quad Parts
• Motorcycle Tools & Accessories

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