Cylinder Works 77mm Kit – Yamaha YZ250F / WR250F (2001–2004)
Cylinder Works 77mm Standard Bore Cylinder Kit – Fits Yamaha YZ250F & WR250F (2001–2004)
Bring your early-generation Yamaha 250F engine back to factory performance with the Cylinder Works 77.00 mm Standard Bore Cylinder Kit. Designed as a direct OEM-style replacement, this complete top-end rebuild kit includes everything needed to restore compression, durability, and reliability—no replating or machining required.
✅ What’s Included
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77.00 mm Nickel–Silicon Carbide plated cylinder
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Vertex piston kit (piston, rings, wrist pin, circlips)
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Top-end gasket set for a complete rebuild
⚙️ Key Features
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Direct bolt-on design — ready to install, no replating necessary
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Nickel–Silicon Carbide coating provides exceptional heat resistance and wear protection
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Matched Vertex piston kit ensures quiet operation and long-term performance
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12.7:1 compression ratio for strong, responsive power delivery
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Made in the USA to exacting standards
⚠️ For closed-course competition use only. Not legal for use on public lands or highways in California.
📦 Fitment
Yamaha Models (2001–2004):
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YZ250F
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WR250F
🛡️ Warranty Info
Backed by Cylinder Works’ limited manufacturer warranty.
Professional installation is recommended for proper performance and longevity.
💲 Suggested Retail: $694.95
🔢 SKU: 0931-0278 / 20002-K01
🏷️ Brand: Cylinder Works
📦 Shipping Information
In-Stock Items:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
- Sneakers: 1–2 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
