Cylinder Works Standard Bore Cylinder – Yamaha YZ250 (1999–2025)

Bring your YZ250 back to factory performance with the Cylinder Works 20009 Standard Bore Cylinder. This direct-bolt-on replacement delivers OEM fit, finish, and durability without the hassle of replating or machine work. Perfect for complete top-end rebuilds or fresh race prep.

Description

Precision-engineered and nickel-silicon-carbide plated, this cylinder provides excellent heat transfer, wear resistance, and long service life. Each unit is cast and finished in the USA to meet or exceed OEM standards, ensuring a perfect fit for all YZ250 2-stroke engines from 1999 through 2025.

What’s Included

✅ Cylinder Works 66.40 mm Standard Bore Cylinder
✅ Ready-to-install — direct bolt-on design
✅ Works with OEM or stock-bore piston and gasket kits

Fitment

📦 Yamaha YZ250 (1999 – 2025)

Designed for stock-bore (66.4 mm) top ends. Works with OEM cylinder head and valves.

Warranty Info

🛡️ Backed by Cylinder Works USA manufacturing quality and material warranty.

Key Features

• Ready to install — no replating or machining required

• Nickel-silicon-carbide plating for long-life performance

• OEM-grade casting and finish; matches factory port layout

• Maintains 250 cc displacement and original compression

• Made in the USA

Price & SKU

💲 Retail Price: $597.95
🔑 SKU: 0931-1078 / 20009
⚖️ Weight: 6.06 lb
📦 Ships next business day from stocked warehouse