ProX Crankshaft Bearing and Seal Kit 23.CBS22005 — Yamaha YZ125 / YZ125X 2005-2026

Product Description

Keep your engine running at peak efficiency with the ProX Crankshaft Bearing and Seal Kit. Designed specifically for riders who demand reliability, this kit provides a complete solution for restoring your Yamaha’s bottom-end performance, whether you are performing a routine rebuild or a full engine overhaul.

Each component in this kit is manufactured to meet or exceed OEM specifications, ensuring that you get factory-level durability without the premium dealer price tag. By utilizing high-quality materials and precise engineering, ProX ensures your crankshaft maintains smooth rotation and proper sealing to protect your engine’s internal components from premature wear and failure.

Top Features: ProX Crankshaft Bearing and Seal Kit

• Precision-engineered to exact OEM specifications for maximum reliability and engine longevity
• Comprehensive kit includes all necessary high-grade bearings and seals for a complete bottom-end service
• Compatible with both OEM crankshafts and high-performance ProX replacement crankshafts
• Optimized for the high-revving demands of 2-stroke off-road racing and trail riding environments

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Should I replace my crankshaft bearings during a top-end rebuild?
A: While not always required, if you have high hours on your bottom end or detect any side-to-side play in the connecting rod, it is highly recommended to replace these bearings to avoid catastrophic engine failure.

Q: Is this kit compatible with a stock Yamaha crankshaft?
A: Yes, this kit is specifically designed to work perfectly with both original equipment manufacturer (OEM) crankshafts and ProX replacement crankshafts.

Expert Pro-Tip: Always use a high-quality assembly lube on the bearings during installation and ensure your engine cases are clean and free of debris. When installing the seals, take your time to seat them perfectly flush—a cocked seal can lead to air leaks, which will cause your bike to run lean and risk a seized piston.

Recommended Pairings:
o Yamaha YZ125 Performance Parts & Upgrades
o Yamaha 2-Stroke Performance Parts
o Essential Engine Rebuild Tools

About Moto-House MX

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.

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