CYLINDER WORKS - 21002-K01 - Cylinder Kit - Big Bore - 80.00 mm - Yamaha
The CYLINDER WORKS 21002-K01 is a big bore cylinder kit with a +3.00 mm overbore and 12.5:1 compression ratio for 2001-2013 Yamaha YZ250F and WR250F models, featuring a Nickel silicon carbide sleeve and matching Vertex pistons for longevity and reduced engine noise — a ready-to-install kit made in the USA with no machine work required.
Features
- Cylinder kit includes matching Vertex pistons to ensure longevity, performance and reduced engine noise
- Cylinders have a nickel silicon carbide cylinder sleeve
- Look virtually identical to OEM cylinders
- Kit includes cylinder, pistons, rings, pin, clips and gaskets
- Made in the USA
- Cylinder does not require machine work (unless noted).
OEM Part Numbers: 5NL-11311-00-00, 5UL-11311-00-00, 5XC-11311-00-00, 5XC-11311-01-00, 5XC-11311-10-00
Specs
- Color/Finish: Gray
- Compression Ratio: 12.5:1
- Overbore: +3.00 mm
- Engine Type: 4-Cycle
- Cylinder Diameter: 80.00 mm
- Displacement: 270 cc
- Riding Style: Off-Road
- Cylinder Diameter: 80,00 mm
- Material: Aluminum
- Units: Kit
- Material: Cast
- Product Name: Cylinder Kit
- Style: Big Bore
OEM Part Numbers
- 5NL-11311-00-00, 5UL-11311-00-00, 5XC-11311-00-00, 5XC-11311-01-00, 5XC-11311-10-00
Frequently Asked Questions - CYLINDER WORKS - 21002-K01 - Cylinder Kit - Big Bore - 80.00 mm - Yamaha
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
