Cylinder Works Big Bore Cylinder Kit (269cc) - 3.00mm Oversize to 80.00mm, 12.5:1 Compression

OEM appearing big bore cylinder kit, a hand matched, forged Vertex big bore piston and top-end gasket kit.
These kits offer you an affordable way to increase horsepower and engine displacement without giving your secret away to your competition.
Cylinder- new, not remanufactured, cast aluminum nickel silicon carbide (NSC) electroplated big bore cylinder that appears just like an OE cylinder. NSC is a composite of a nickel and silicon carbide, providing an excellent wear resistant surface with oil retention capabilities. Cylinders are then diamond honed to the exact bore dimension and proper surface finish to ensure the proper ring seal and oil retention.
Vertex big bore piston- To handle the internal pressures of a four-stroke engine, Vertexs big bore four-stroke pistons are forged from the highest quality 2618 aluminum alloy for superior strength and durability. Vertex uses unique piston profiles and compression ratios, offered in A, B, C and D sizes, to maximize power and performance while reducing blow-by and oil consumption. Each Vertex piston is then hand matched to fit each Cylinder Works cylinder perfectly.
Gasket kits- These kits contain the necessary gaskets to rebuild your top end. Kits include head, base, exhaust gaskets, and o-rings necessary when removing the cylinder and head during routine maintenance.

Cylinder Works Part #: 21002-K01

Fits the Following:

• 2001 Yamaha WR250F
• 2002 Yamaha WR250F
• 2003 Yamaha WR250F
• 2004 Yamaha WR250F
• 2005 Yamaha WR250F
• 2006 Yamaha WR250F
• 2007 Yamaha WR250F
• 2008 Yamaha WR250F
• 2009 Yamaha WR250F
• 2011 Yamaha WR250F
• 2012 Yamaha WR250F
• 2001 Yamaha YZ250F
• 2002 Yamaha YZ250F
• 2003 Yamaha YZ250F
• 2004 Yamaha YZ250F
• 2005 Yamaha YZ250F
• 2006 Yamaha YZ250F
• 2007 Yamaha YZ250F
• 2008 Yamaha YZ250F
• 2009 Yamaha YZ250F
• 2010 Yamaha YZ250F
• 2011 Yamaha YZ250F
• 2012 Yamaha YZ250F
• 2013 Yamaha YZ250F