ProX Crankshaft Bearing and Seal Kit 23.CBS24001 — Yamaha / Gas Gas 250F / 300F 2001-2025

Product Description

Ensure your 4-stroke engine performs at its best with the ProX Crankshaft Bearing and Seal Kit. This premium kit is engineered to provide a reliable, high-performance solution for your crankshaft rebuild, meeting or exceeding OEM specifications for precision fitment and long-lasting durability.

Whether you are tackling a comprehensive engine overhaul or routine maintenance, this kit includes the essential high-quality bearings and seals needed to get your machine back on the track or trail. Designed for the high-RPM demands of 4-stroke performance, the ProX kit helps maintain crankshaft stability, reducing vibration and protecting your engine from costly mechanical failures.

Top Features: ProX Crankshaft Bearing and Seal Kit

• Engineered to exact OEM specifications for maximum performance and superior longevity
• Comprehensive kit containing the vital bearings and seals required for a full crankshaft replacement
• Engineered to work seamlessly with both OEM and ProX performance crankshafts
• Optimized for the high-revving demands of modern 4-stroke off-road and street motorcycles

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 suitable for high-hour engine rebuilds?
A: Absolutely. When performing a full rebuild on a 4-stroke, replacing crankshaft bearings is a critical step to ensure the longevity of your new piston and cylinder components.

Q: Does this kit include everything needed for the crankshaft?
A: Yes, the ProX 23.CBS24001 includes the necessary high-quality bearings and seals to service the crankshaft properly, keeping your bottom end operating smoothly.

Expert Pro-Tip: When installing new crank bearings on a 4-stroke, patience is key. I always recommend freezing the crankshaft for a few hours before installation, while gently heating the engine cases. This thermal difference makes seating the bearings much smoother and prevents unnecessary stress on the new components or the aluminum cases.

Recommended Pairings:
o Yamaha YZ250F Performance Parts
o Yamaha 4-Stroke Performance Upgrades
o Essential Motorcycle 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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