Vertex Engine Oil Seal Kit 822993 — Yamaha YZ65 / YZ85 2018-2025

Product Description

When performing a complete engine rebuild, replacing all internal seals is vital to maintaining crankcase pressure and preventing oil leaks. The Vertex Engine Oil Seal Kit provides an all-in-one solution, including every essential oil seal for the engine—including the critical crankshaft seals.

Proudly made in the USA, these seals are manufactured to meet or exceed OEM standards for material quality and sealing capability. By choosing this comprehensive kit, you can be confident that your engine is sealed tight against external contaminants and internal fluid bypass, ensuring consistent power and longevity for your Yamaha YZ mini-racer.

Top Features: Vertex Engine Oil Seal Kit

• Complete engine seal set for a full rebuild, including primary crankshaft seals
• Manufactured in the USA for premium material reliability and precision
• Essential for maintaining proper crankcase pressure in high-revving 2-stroke engines
• Provides a factory-grade seal to prevent oil leaks and air ingestion

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: Why is it important to replace all seals during a rebuild?
A: Rubber seals degrade over time due to heat, chemical exposure, and friction. Even if a seal looks okay, it has likely lost its pliability. Reusing old seals is the most common cause of "mystery" air leaks that make an engine impossible to tune correctly.

Q: Does this kit include valve stem seals?
A: No, this kit is specifically designed for the YZ65 and YZ85 2-stroke engines, which do not utilize valve stem seals.

Expert Pro-Tip: When installing new crankshaft seals, always apply a light coating of clean engine oil or grease to the seal lip. This prevents the rubber from dry-friction burning during the first few rotations of the engine before the oil pump or splash lubrication takes over.

Recommended Pairings:
• Yamaha YZ85 Performance Parts & Upgrades
• Yamaha YZ65 Performance Parts
• Yamaha 2-Stroke Performance Parts

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