Cylinder Works Big Bore Cylinder Kit 80mm 270cc - Yamaha YZ250F / YZ250FX / WR250F (2019-2024)
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Cylinder Works Big Bore Cylinder Kit 80mm - Yamaha YZ250F / YZ250FX / WR250F
Take your Yamaha 250F from 250cc to 270cc with this complete big bore cylinder kit. The +3mm overbore delivers noticeable power gains throughout the RPM range. Includes Vertex matched piston, Nikasil plated cylinder, and full gasket kit. Direct bolt-on with no machine work required. Made in the USA.
What's Included
- Cylinder Works 80mm big bore cylinder
- Vertex matched piston
- Piston rings
- Wrist pin and clips
- Complete top end gasket kit
Key Features
Big bore design increases displacement from 250cc to 270cc. Nikasil plated cylinder for long life and excellent heat transfer. Vertex piston ensures longevity and reduced engine noise. Looks virtually identical to OEM. Direct bolt-on installation with no machine work required.
Specifications
- Bore Size: 80mm (+3mm overbore)
- Displacement: 270cc
- Compression Ratio: 13.8:1
- Engine Type: 4-Stroke
- Material: Cast Aluminum with Nikasil plating
- Weight: 3.51 lbs
Fitment
Yamaha YZ250F: 2019-2024
Yamaha YZ250FX: 2020-2024
Yamaha WR250F: 2020-2024
Why Cylinder Works?
Cylinder Works is a trusted name in powersports engine components. Their cylinders and kits are manufactured in the USA to strict tolerances. Used by professional racers and weekend riders who demand reliability.
📦 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.
