Description
The Renthal Ultralight Rear Sprocket puts noticeable acceleration gains directly under your control without sacrificing durability. At 66% lighter than steel, this 7075-T6 aluminum sprocket reduces unsprung mass and rotational inertia—changes you’ll feel in how quickly your Yamaha responds to throttle input. Whether you’re attacking a motocross track or pushing hard on technical terrain, precision CNC machining and self-cleaning mud grooves ensure consistent power delivery lap after lap.
- Tooth Count: 49T
- Chain Size: 520
- Material: 7075-T6 aluminum
- Weight Reduction: 66% lighter
- Construction: CNC-machined precision
- Mud Grooves: Self-cleaning design
- MPN: 131U-520-49GBSI
- Fitment: Yamaha YZ models
- Installation: Bolt-on replacement
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