Yamaha B4X-WB033-00-B0 - YZ125/YZ125X Piston Rebuilt Kits is an accessory kit designed for rebuilding the top end of select YZ125 and YZ125X models, including all necessary parts for this maintenance task.

---

Key Features & Benefits

• Genuine Yamaha forged aluminum piston for strength and heat resistance
• Complete top-end rebuild kit — piston, ring, wrist pin, circlips, gaskets, seals, and O-rings in one package
• Proven OEM fitment tested to Yamaha's durability and reliability standards
• One-stop rebuild — no separate sourcing of gaskets, seals, or small hardware
• Restores compression and power output to like-new levels
• Convenience and cost savings versus buying individual top-end components separately

---

Fits These Yamaha Models

Yamaha Model	Compatible Years
YZ125	2022-2027
YZ125X	2023-2027

---

Frequently Asked Questions

What is Yamaha part B4X-WB033-00-B0?

B4X-WB033-00-B0 is the Yamaha YZ125/YZ125X Piston Rebuilt Kits, an accessory kit containing parts to rebuild the top end of select YZ125 and YZ125X models.

Is B4X-WB033-00-B0 a Yamaha accessory?

Yes, B4X-WB033-00-B0 is classified as a Yamaha accessory as indicated in its product type.

Which Yamaha models fit B4X-WB033-00-B0?

This piston rebuilt kit fits select Yamaha YZ125 and YZ125X models from 2011 and years 2021 through 2027. Confirm the exact model and year compatibility before ordering.

---

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.