20-22 Yamaha YZ125X YZ 125X 54mm Athena Piston Cylinder Head Top End Rebuild Kit

Athena 54mm Top End Rebuild Kit for 2020–2022 Yamaha YZ125X

Complete High-Performance Cylinder & Piston Rebuild Kit

Restore your engine’s power and reliability with the Athena 54mm Cylinder, Piston, and Head Top End Rebuild Kit. Designed specifically for the Yamaha YZ125X, this premium kit delivers unmatched performance, durability, and factory-level precision.

🔥 Key Features & Benefits

Built by industry-leading Athena, this top end kit ensures maximum compression, improved throttle response, and exceptional engine longevity.

• 54mm Nikasil Athena Cylinder for optimal durability
• 54mm Athena coated piston kit including piston, rings, pin, and clips
• Athena complete top end gasket set for a perfect OEM-quality seal
• Athena high-performance cylinder head for reliable compression
• Athena head stud kit for long-term strength and security

✅ Compatibility

This kit fits the following Yamaha 2-stroke models with 100% direct bolt-on accuracy.

• 2020 Yamaha YZ125X
• 2021 Yamaha YZ125X
• 2022 Yamaha YZ125X
• Perfect fit for OEM crankcases and hardware
• Includes all required top-end components

❓ Frequently Asked Questions (FAQ)

• Q: Does this kit include everything needed for a full top-end rebuild?

  A: Yes. It includes the cylinder, piston kit, head, gasket set, and head stud kit.

• Q: Is the cylinder already Nikasil plated?

  A: Yes, the Athena cylinder comes fully Nikasil plated and ready for installation.

• Q: Are Athena parts reliable for racing?

  A: Absolutely. Athena components are trusted worldwide for both racing and recreational riding.

• Q: Will this increase power over stock?

  A: Yes. Fresh compression and Athena’s precision engineering improve throttle response and usable power.

🌟 Why Buy from BPRATV? Trusted Performance Experts 🌟

At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. The Best Price. We supply only the highest-quality rebuild kits backed by trusted brands like Athena. Trust BPRATV to keep your Yamaha YZ125X performing at its peak, every single time.

Get Your Athena 54mm Top End Kit Today — Restore Power & Rip Harder!

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© BPRATV LLC 1-year limited warranty from the manufacturer for material or workmanship defects.*

Due to the nature of high performance and racing applications, BPRATV LLC components are sold without express warranty or any implied warranty of merchantability or fitness for a specific purpose. BPRATV LLC shall not, under any circumstances, be liable for any specific, incidental or consequential damages, including, but not limited to, damage, or loss of property or equipment, loss of profits or revenue(s), cost of purchased or replacement goods, or claims of customers of the purpose, which may arise and/or shall result from sale, installation or use of these parts. Installation of these parts may void vehicle manufacturers warranty coverage and/or may cause the vehicle to be illegal in some locations.

This product is exempt from the emission standards and related requirements of 40 C.F.R. § 1051 as provided by 40 C.F.R. § 1051.620, and California law [e.g., vehicle code §§ 27156 and 38391]. This product is sold only for use in connection with EPA-certified, purpose-built, nonroad vehicles used solely for closed course, nonroad competition/racing and not used for any recreational purpose or on public highways or right of ways maintained by and open to the public. This product is sold only in connection with machines that do not fall under state and/or federal noise or emission standards/regulations. Purchasers who/that purchase this product represent and warrant that the product is purchased only in connection with EPA-certified, emission-regulations-exempt and noise-regulations-exempt competition/racing vehicles as interpreted under applicable state and/or federal law.