Cylinder Works Big Bore Cylinder Kit

Item Number: 325572

5 stars 1 Review

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Product Description

Cylinder Works

Cylinder Works Big Bore Cylinder Kit

  • Ready to install, direct bolt on cylinders require no plating and look virtually identical to the OEM cylinder.
  • Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noise.
  • Nickel silicon carbide plated for long life.
  • Kits come complete with gaskets, cylinder, piston, rings, pin and clips.
  • Big bore cylinders do not require machine work unless noted.

Spec Details
Compression Ratio Varies (make selection above)
Cylinder Diameter Varies (make selection above)
Displacement Varies (make selection above)
Piston Diameter Varies (make selection above)
Size Over Standard Varies (make selection above)

Vehicle Fitment

Fitment is guaranteed or your money back plus free return shipping. Don't waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

Arctic Cat

  • DVX 400 2004-2008


  • CRF250R 2004-2012
  • CRF250X 2004-2009, 2012
  • CRF450X 2005-2009, 2012
  • TRX700XX 2008-2009


  • 250 SX-F 2006-2012
  • 250 XC-F 2007-2012
  • 350 SX-F 2011-2012


  • KFX400 2003-2006
  • KLX400R 2003-2004
  • KX250F 2004-2012


  • DR-Z400 2000-2004
  • DR-Z400SM 2005-2009
  • LT-R450 QuadRacer 450 2006-2009
  • LT-Z400 QuadSport 400 2003-2012
  • RM-Z250 2004-2012


  • WR250F 2001-2012
  • WR450F 2003-2012
  • YFM700FG Grizzly 700 FI 4x4 2007-2012
  • YFM700R Raptor 700R 2006-2012
  • YFZ450 2004-2009, 2012
  • YFZ450R 2009-2012
  • YFZ450X 2010-2011
  • YZ85 2002-2012
  • YZ250F 4-Stroke 2001-2012
  • YZ450F 2003-2012

Customer Reviews

Big bore power

out of 5
5 stars

By on December 21, 2016

Just what I need to get that much more grunt out of my bike. Awesome kit!

5 stars
5 stars

Questions & Answers

  • Can i change my cam to a stage three without having to change anything else or what should i do?

    By: nick

    When you install big bore cylinder kit it's recommended to change your cams as well. Any time you change the displacement of the engine, you should match the valve diameter and cam lift to to the bigger set up if you want to get the most power out of the new set up.

    Let us know what you'r working with and our team will be happy to help you find a complete kit with everything you need to get the most power from your ride.

    By: Staff