Cylinder Works 66.40mm Standard Bore Cylinder Kit – Yamaha YZ250 (1999–2023)
- Ships next business day
- 30-day hassle-free returns
- Call us: 541-668-7503
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Cylinder Works Standard Bore Cylinder Kit (66.40mm) – Yamaha YZ250 (1999–2023)
🛠️ Description
Restore the power and reliability of your YZ250 with this Cylinder Works Standard Bore Cylinder Kit. Designed as a direct bolt-on replacement, it delivers OEM-level fit and performance while eliminating the need for cylinder replating. Perfect for riders who want a fresh top end with long-lasting durability.
✅ What’s Included
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Standard bore cylinder (66.40mm)
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Vertex piston kit (piston, rings, pin, clips)
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Top-end gasket kit
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Wrist pin bearing
📦 Fitment
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Yamaha YZ250 (1999–2023)
🛡️ Warranty Info
All Cylinder Works kits are backed by manufacturer warranty against defects in materials and workmanship. Professional installation is recommended.
🔑 Key Features
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Ready-to-install, direct bolt-on cylinder
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Nickel Silicon Carbide plating for durability and longevity
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Matches OEM appearance and performance
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Includes matched Vertex piston for reduced engine noise and reliable performance
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No replating or machining required
📦 Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
Questions? Contact us, we respond within 24 hours.
