Renthal Twinring Rear Sprocket (51T) 1120-520-51GPGN - Kawasaki / Suzuki KX125 / KX250 / KX450 / KLX250 / KLX300 1984-2026

Product Description

The Renthal Twinring Rear Sprocket is designed to provide motocross and off-road riders with an optimal blend of minimal weight and extended durability. Built to survive punishing track and trail environments, this 51-tooth green sprocket outlasts standard aluminum choices while keeping rotating mass low.

The inner ring uses high-strength Ultralight 7075 T-6 aluminum identical to standard Renthal sprockets, while the outer ring consists of electro-less nickel coated steel[cite: 1]. The outer ring is expanded at 200°C and then fitted over the inner ring, creating an interference fit that, alongside a 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 high-strength Ultralight 7075 T-6 aluminum for proven structural integrity[cite: 1].
• Outer ring features electro-less nickel coated steel built with minimal material to keep weight down[cite: 1].
• 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 prevent dirt build-up to reduce chainwheel wear and weight[cite: 1].
• Engineered to outlast conventional all-aluminum sprockets by up to 3 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 does the thermal interference fit work on the Twinring?
A: The steel outer ring is heated and expanded at 200°C before being fitted onto the aluminum inner ring, creating a permanent bond backed by flat socket head screws and a wave design[cite: 1].

Q: Do the built-in mud grooves help reduce wear?
A: Yes, the self-cleaning grooves between each tooth actively clear out dirt and debris during rotation to minimize premature chainwheel wear[cite: 1].

Expert Pro-Tip: Always inspect your drive chain and front sprocket when installing a new rear sprocket. Putting a fresh dual-compound sprocket onto a heavily stretched or worn chain will cause accelerated wear. Clean the hub mounting surface thoroughly and torque all sprocket bolts to factory specifications using a thread-locking compound.

Recommended Pairings:

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

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