Cylinder Works Big Bore Cylinder Kit (256cc) - 1.00mm Oversize to 79.00mm, 13.0:1 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 #: 12001-K01

Fits the Following:

• 2004 Honda CRF250R
• 2005 Honda CRF250R
• 2006 Honda CRF250R
• 2007 Honda CRF250R
• 2008 Honda CRF250R
• 2009 Honda CRF250R
• 2004 Honda CRF250X
• 2005 Honda CRF250X
• 2006 Honda CRF250X
• 2007 Honda CRF250X
• 2008 Honda CRF250X
• 2009 Honda CRF250X
• 2012 Honda CRF250X
• 2013 Honda CRF250X