Renthal Ultralight Rear Sprocket - Yamaha YZ YZF WRF 51T Silver

The Renthal Ultralight Rear Sprocket is a high-performance motocross and enduro hardware component...

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Product Information

Full details

The Renthal Ultralight Rear Sprocket is designed for motocross and enduro riders seeking enhanced performance on Yamaha YZ, YZF, and WRF models (1999-2024). Its primary benefit is a significant weight reduction leading to improved acceleration and braking, thanks to its high-strength aluminum construction. A potential consideration is its specialized application, meaning it's ideal for performance-oriented riding but may not be suitable for all-purpose use.

All features

Model Part Number150U-520-51GBSI
BrandRenthal

Extended Product Information

FAQs

What material is the Renthal Ultralight Rear Sprocket made from?

It is precision CNC machined from high strength 7075 T651 Aluminium alloy.

How much weight does this sprocket save compared to steel?

It offers a significant 66% weight saving compared to steel sprockets.

What specific Yamaha models is this sprocket compatible with?

It is designed for Yamaha YZ, YZF, and WRF models from 1999 to 2024.

What is the tooth count of this specific sprocket?

This model has a 51-tooth count.

Will this sprocket improve my bike's acceleration?

Yes, the significant weight reduction and optimized tooth profile contribute to improved acceleration by reducing unsprung rotating weight.

How should I maintain the sprocket for longevity?

Regular cleaning with a mild degreaser and water, followed by proper lubrication, is recommended. Inspect for wear regularly.

Can I use this sprocket with any chain?

It is designed for a 520 chain pitch. For optimal performance and longevity, it's recommended to use it with a compatible Renthal chain and front sprocket.

Troubleshooting

Premature wear on sprocket teeth.

Ensure proper chain tension and alignment. Use a high-quality, compatible chain and front sprocket. Clean and lubricate the drivetrain regularly.

Noise or vibration during operation.

Verify the sprocket is correctly installed and torqued. Check for any debris caught between the sprocket and hub or swingarm. Ensure the chain is not overly tight or loose.

Sprocket does not fit the hub.

Double-check the model and year compatibility. Ensure you have the correct part number for your specific Yamaha motorcycle. Verify the chain pitch matches.

Pros and Cons

Pros

  • Significantly reduces overall motorcycle weight, improving agility.
  • Enhances acceleration and braking performance due to lower rotational mass.
  • Durable construction offers extended lifespan under harsh conditions.
  • Precision manufacturing ensures efficient power transfer.

Cons

  • May require chain and sprocket combination adjustment for optimal performance.
  • Aluminum construction can be more susceptible to damage from extreme impacts than steel.
  • Specific fitment to Yamaha models means it's not a universal part.

Setup, Compatibility & Care

Compatibility: This sprocket is specifically designed for Yamaha YZ, YZF, and WRF models manufactured between 1999 and 2024, featuring a 520 chain pitch and a 51-tooth count. Ensure your motorcycle model and year fall within this range and that it uses a 520 chain. It is recommended to pair this sprocket with a compatible Renthal chain and front sprocket for optimal performance and longevity.

Installation: Installation should be performed by a qualified mechanic or an experienced individual familiar with motorcycle drivetrain maintenance. Always follow the manufacturer's torque specifications when securing the sprocket to the hub.

Care: To maintain performance and extend the life of the sprocket, regular cleaning is essential. Remove dirt, mud, and debris using a mild degreaser and water. Ensure the sprocket and chain are properly lubricated after cleaning. Inspect the sprocket teeth for wear or damage regularly, and replace if significant wear is observed.