Here is the big bore kit proposed by ATHENA to increase the displacement of your motocross / enduro HONDA CRE 450cc 4 stroke from 2007 to 2008 / HONDA CRF 450cc 4 stroke from 2005 to 2014 / HONDA CRM 450cc 4 stroke from 2007 to 2008 / HONDA CRMF 450cc 4 stroke from 2005 to 2009 / HONDA CREF 450cc 4 stroke from 2005 to 2009. This kit in Ø100mm against Ø96mm of origin thus makes it possible to pass your motor bike of 450cc has 490cc! A gain of torque and performance will be immediately felt. It allows a gain of 4 HP on average which is huge on this vehicle. You will go from 51.3 HP of origin to 55.3 HP thanks to the kit ATHENA BIG BORE. Enough to have fun on the tracks or in the forest. ATHENA has also planned things well because this top engine is sold complete. It includes the cylinder, piston, ring and all the seals you need for a quality and tight reassembly. The advantage of taking this engine is that it is designed to be mounted on the original connecting rod with the original cylinder head and camshaft. So you don't have any modification to do ! Here attached the power curve so that you can see by yourself the difference between the original and the big bore. You will also find a detailed list of vehicles on which this cylinder can be mounted.

Fits on:

HM CRE 450 2003

HM CRE 450 2004

HM CRE 450 2005

HM CRE 450 2006

HM CRE 450 2007

HM CRE 450 2008

HM MOTARD 450 2003

HM MOTORCYCLE 450 2004

HM MOTORCYCLE 450 2005

HM MOTORCYCLE 450 2006

HM MOTORCYCLE 450 2007

HM MOTORCYCLE 450 2008

HONDA CRF450X 2005

HONDA CRF450X 2006

HONDA CRF450X 2007

HONDA CRF450X 2008

HONDA CRF450X 2009

HONDA CRF450X 2010

HONDA CRF450X 2011

HONDA CRF450X 2012

HONDA CRF450X 2013

HONDA CRF450X 2014

HONDA CRF450X 2015

HONDA CRF450X 2016