ProX Crankshaft Bearing and Seal Kit 23.CBS24098 — Yamaha / Gas Gas 400-450F 1998-2026

Product Description

Restore your engine's bottom-end integrity with the ProX Crankshaft Bearing and Seal Kit. This premium kit is designed for performance-minded riders who demand OEM specifications and long-term durability during engine maintenance or full rebuilds.

Each kit contains high-grade bearings and seals engineered to withstand the extreme heat and stress of 4-stroke off-road, street, and ATV applications. By choosing ProX, you ensure your crankshaft operates with optimal stability, reducing vibration and protecting your internal engine components from premature wear and failure.

Top Features: ProX Crankshaft Bearing and Seal Kit

• Manufactured to strict OEM standards for maximum reliability and performance
• Complete kit includes all necessary bearings and seals for a professional-grade replacement
• Engineered for seamless compatibility with both original OEM and performance ProX crankshafts
• Optimized for the high-RPM demands of 4-stroke racing and demanding trail 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: Is this kit compatible with my stock crankshaft?
A: Yes, this kit is specifically designed to work perfectly with both original OEM crankshafts and high-performance ProX replacement crankshafts.

Q: Should I replace the seals even if they look good?
A: Always. Once an engine is apart for a crankshaft service, reusing old, heat-cycled seals is a risk that can lead to oil leaks and air intake issues.

Expert Pro-Tip: When installing main bearings into the engine cases, always ensure your cases are completely clean and free of old gasket material or debris. I recommend heating the engine cases slightly and chilling the new bearings; this thermal difference allows the bearings to slip into place without excessive force, preventing damage to the race or the engine cases.

Recommended Pairings:
o Yamaha YZ450F Performance Parts & Upgrades
o Yamaha YFZ450 Performance Parts
o Yamaha 4-Stroke Performance Parts

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.

Moto-House MX – Choice of Champions – Clermont / Montverde, FL. Central Florida's premier powersports source with lightning-fast worldwide shipping.