Yamaha B1B-W001A-00-00 - YZ125X Drive Chain & Sprocket is an accessory kit including the front sprocket, rear sprocket, and chain for convenient purchase.

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Key Features & Benefits

• Genuine Yamaha kit — includes original-equipment front sprocket, rear sprocket, and chain
• All three drivetrain wear components matched and replaced together
• Convenience and total savings versus buying chain and sprockets separately
• Keeps the whole drive system in sync for even wear and reliable power transfer

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Fits These Yamaha Models

Yamaha Model	Compatible Years
YZ125X	2020-2022
YZ250FX	2020-2021

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Frequently Asked Questions

What is Yamaha part B1B-W001A-00-00?

B1B-W001A-00-00 is the Yamaha YZ125X Drive Chain & Sprocket, an accessory kit that includes the front sprocket, rear sprocket, and chain.

Is B1B-W001A-00-00 a Yamaha accessory?

Yes, B1B-W001A-00-00 is classified as a Yamaha accessory designed for convenience by combining sprocket and chain parts in one kit.

Which Yamaha models fit B1B-W001A-00-00?

This kit fits select YZ125X models from 2020 through 2027 and YZ250FX models from 2020 to 2021. Confirm model and year fitment before ordering.

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WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.