Big Bore cylinder kit complete Cylinder Works for Yamaha YZ 250 F 14-18 (+3mm bore gain - 269cc - compression ratio 13.5:1)

All cylinder kit are sold complete with all needed for installation: cylinder Cylnder Works, Vertex piston and all needed gaskets and seal to complete the installation.

As an alternative to costly OEM cylinder or the time consuming process of re-plating existing cylinder, Cylinder Works offers enthusiast access to a complete line of OEM quality dirt bike replacement cylineder kits. In addition to standard bore, stock compression replacement cylinder kits, Cylinder Works also turns up the horsepower with a full line of hig-compresion and big bore cylinder kits.

3 different kits ara available (read in the title wich is the kit that refers the product):

• Standard Bore kit: maintains all features of an OEM cylinder.

• Standard Bore Hi Compression kit: maintains all features of an OEM cylinder with an increase of compression ratio (see in the title the compression ratio will be get).

• BIg Bore kit:  maintains all features of an OEM cylinder with an increase of engine cc (see in the title the engine cc will be get and the possible change of compression ratio).
  
   

• Stock in appearance
• Precision honed
• Nickel silicon carbide plated
• OEM quality but with a competitive price
• Piston are hand matched for precision fitment
• All needed gaskets and seals to complete the installation
• A Vertex piston, complete with piston rings, wirst pin and circlips