![Cylinder Works Cylinder Kit - Standard Bore - 66.40 mm - Yamaha [20009K01]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/1280x1280/products/126685/136619/parts-09310587__12602.1787028764.jpg?c=2 "Cylinder Works Cylinder Kit - Standard Bore - 66.40 mm - Yamaha [20009K01]")
![Cylinder Works Cylinder Kit - Standard Bore - 66.40 mm - Yamaha [20009K01]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/500x659/products/126685/136619/parts-09310587__12602.1787028764.jpg?c=2 "Cylinder Works Cylinder Kit - Standard Bore - 66.40 mm - Yamaha [20009K01]")
Cylinder Works Cylinder Kit - Standard Bore - 66.40 mm - Yamaha [20009K01]
Manufacturer Part Number: 20009K01
Parts Unlimited Part Number: 09310587
Product Type: Cylinders & Parts
Cylinder Kit - Standard Bore - 66.40 mm - Yamaha
Details
- Bore - Oversize: Standard
- Riding Style: Off-Road
- Cylinder Diameter: 66.40 mm
- Product Name: Cylinder Kit
- Compression Ratio: Standard
- Style: Standard
- Units: Kit
- Cylinder Bore Coating: Nickel-Silicon Carbide
- Displacement: 250 cc
- Engine Type: 2-Cycle
- Color/Finish: Gray
- Cylinder Diameter: 66,40 mm
- Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders
- Cylinder kit includes matched Vertex pistons to ensure longevity, performance and reduced engine noise
- Nickel Silicon Carbide plated for long life
- Kit comes complete with gaskets, cylinder, piston, rings, pin and clips
- Made in the USA
- Big bore cylinders do not require machine work.
Verified Fitment
- 2009 Yamaha YZ250
- 2015 Yamaha YZ250
- 2000 Yamaha YZ250
- 2023 Yamaha YZ250
- 2007 Yamaha YZ250
- 2010 Yamaha YZ250
- 2020 Yamaha YZ250
- 2006 Yamaha YZ250
- 2011 Yamaha YZ250
- 2017 Yamaha YZ250
- 2005 Yamaha YZ250
- 2008 Yamaha YZ250
- 2012 Yamaha YZ250
- 2013 Yamaha YZ250
- 2016 Yamaha YZ250
- 1999 Yamaha YZ250
- 2019 Yamaha YZ250
- 2021 Yamaha YZ250
- 2018 Yamaha YZ250
- 2024 Yamaha YZ250
- 2003 Yamaha YZ250
- 2004 Yamaha YZ250
- 2022 Yamaha YZ250
- 2014 Yamaha YZ250
- 2001 Yamaha YZ250
- 2002 Yamaha YZ250
Yes
![Cylinder Works Cylinder Kit - Standard Bore - 95.00 mm - Yamaha [20001K02]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/500x659/products/126628/136563/parts-09310280__60787.1787028644.jpg?c=2 "Cylinder Works Cylinder Kit - Standard Bore - 95.00 mm - Yamaha [20001K02]")
![Cylinder Works Cylinder Kit - Standard Bore - 97.00 mm - Yamaha [20005K01]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/500x659/products/126648/136583/parts-09310345__92798.1787028687.jpg?c=2 "Cylinder Works Cylinder Kit - Standard Bore - 97.00 mm - Yamaha [20005K01]")
![Cylinder Works Cylinder Kit - Standard Bore - 102.00 mm - Yamaha [20104K01]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/500x659/products/126649/136584/parts-09310374__30738.1787028687.jpg?c=2 "Cylinder Works Cylinder Kit - Standard Bore - 102.00 mm - Yamaha [20104K01]")
![Cylinder Works Cylinder Kit - Standard Bore - 77.00 mm - Yamaha [20002K03]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/500x659/products/126629/136565/parts-09310281__00517.1787028644.jpg?c=2 "Cylinder Works Cylinder Kit - Standard Bore - 77.00 mm - Yamaha [20002K03]")
![Cylinder Works Cylinder Kit - Standard Bore - 102.00 mm - Yamaha [20004K01]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/500x659/products/126654/136589/parts-09310379__42418.1787028696.jpg?c=2 "Cylinder Works Cylinder Kit - Standard Bore - 102.00 mm - Yamaha [20004K01]")