Renthal Twinring Rear Sprocket (50T) 1120-520-50GPGN - Kawasaki / Suzuki KX125 / KX250 / KX450 / KLX250 / KLX300 1984-2026

Product Description

The Renthal Twinring Rear Sprocket is engineered to deliver the ultimate combination of ultra-lightweight design and maximum service life for demanding motocross and off-road riders. Built to handle punishing track and trail conditions, this 50-tooth green sprocket outlasts standard aluminum alternatives while maintaining a minimal rotating weight footprint.

Featuring a dual-material construction, the inner ring uses high-strength Ultralight 7075 T-6 aluminum, while the outer ring is manufactured from electro-less nickel coated steel[cite: 1]. The outer ring is expanded at 200°C and then fitted over the inner core, creating an interference fit that—alongside a specialized wave pattern and flat socket head screws—ensures a permanent bond capable of withstanding severe side impacts[cite: 1].

Top Features: Renthal Twinring Rear Sprocket

• Inner ring is crafted from the exact high-strength Ultralight 7075 T-6 aluminum used in standard Renthal sprockets[cite: 1].
• Outer ring features electro-less nickel coated steel designed with minimal material to keep weight exceptionally low[cite: 1].
• Precision thermal expansion fit at 200°C combined with flat socket head screws secures a permanent bond and prevents chain guide contact[cite: 1].
• Integrated self-cleaning mud grooves between every tooth actively prevent dirt buildup to reduce component wear and weight[cite: 1].
• Engineered to outlast conventional all-aluminum sprockets by up to three times while remaining much lighter than a solid steel rear sprocket[cite: 1].

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

Fitment List

Frequently Asked Questions

Q: How is the permanent bond established between the aluminum inner core and steel outer ring?
A: The steel outer ring is heated and expanded at 200°C before being fitted over the aluminum inner ring, creating a secure thermal interference fit reinforced by flat socket head screws and an interlocking wave pattern[cite: 1].

Q: Do the self-cleaning mud grooves help reduce wear in wet conditions?
A: Yes, the integrated grooves between each tooth channel out mud, dirt, and debris during rotation, preventing abrasive buildup that accelerates sprocket and chain wear[cite: 1].

Expert Pro-Tip: Always inspect your drive chain and front sprocket for wear when installing a new rear sprocket. Mounting a fresh hybrid sprocket onto an excessively stretched chain can severely decrease its service life. Ensure mounting surfaces are clean and torque sprocket bolts to factory specs with a proper thread-locker.

Recommended Pairings:

• MX Chains
• Kawasaki 4-Stroke Performance Parts
• Motorcycle Tools & Accessories

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