97-04 Yamaha YZ125 YZ 125 54mm 54 Athena Cylinder Top End Piston * Stock Head *

97-04 Yamaha YZ125 Athena 54mm Racing Top End Cylinder Kit 14.8:1 Piston

📖 Product Description

Refresh your engine’s power with the Athena 54mm Racing Top End Cylinder Kit, engineered to restore and boost performance on all 1997-2004 Yamaha YZ125 models. This complete top end rebuild solution delivers crisp throttle response, strong mid-range power, and reliable top-end pull—perfect for riders who demand more from their 2-stroke.

Featuring OEM-quality components with race-inspired enhancements, this kit provides exceptional durability, improved compression, and dependable long-term performance. If your YZ125 is lacking power, this rebuild will bring it back to life with renewed strength and consistency.

🔥 Key Features & Benefits

Everything you need for a complete, high-performance top end restoration.

• Athena 54mm OEM stock bore cylinder for precise fit and reliable performance
• High-compression 14.8:1 piston for stronger acceleration and improved power delivery
• Athena power valve kit and cylinder head stud kit included for complete rebuild integrity
• Athena top end gasket kit ensures proper sealing and long-term durability
• All components backed by manufacturer warranty for peace of mind

✅ Compatibility

Designed specifically for Yamaha YZ125 2-stroke dirt bikes.

• YZ125: 1997, 1998, 1999, 2000 (requires head pipe from 1999-2003 YZ125)
• YZ125: 2001, 2002, 2003, 2004
• Uses stock or OEM cylinder head—head not included
• Direct replacement for standard bore engines
• Perfect for racing, practice, or full engine refresh

❓ Frequently Asked Questions (FAQ)

• Q: Does this kit include the cylinder head?
  A: No. The kit uses your stock or OEM head.
• Q: Does this require a specific head pipe?
  A: Yes, for 1997-2000 models you must use a 1999-2003 YZ125 head pipe.
• Q: Is the Athena piston included?
  A: Yes, the kit includes the 54mm 14.8:1 Athena racing piston.
• Q: Does this kit improve performance?
  A: Yes, expect stronger acceleration, improved compression, and smoother power delivery.

🌟 Why Buy from BPRATV? Trusted Performance Experts 🌟

At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. The Best Price. With decades of hands-on engine experience, we supply only proven components that deliver real results. Trust BPRATV to keep your Yamaha YZ125 running at its best, every single time.

Upgrade your YZ125 with race-ready power—order your Athena kit today!

BPRATV - The Best Parts. The Best Performance. The Best Price.

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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 law.