This is the ATHENA Big Bore 300cc Ø72mm replacement cylinder head for YAMAHA YZ 250cc. This good quality aluminium cylinder head allows a good combustion of your gas. However, following strong heat, the cylinder head can become warped and therefore no longer be watertight. In this case, rather than re-planning the cylinder head, we strongly advise you to change it. Because it is a high compression cylinder head. If you overcompress it again, you risk a malfunction of your engine and especially a breakage of it.

Fits on:

YAMAHA YZ 250 (CG13) 250 2003

YAMAHA YZ 250 (CG17) 250 2004

YAMAHA YZ 250 (CG20) 250 2005

YAMAHA YZ 250 (CG23) 250 2021

YAMAHA YZ 250 (CG23) 250 2020

YAMAHA YZ 250 (CG23) 250 2019

YAMAHA YZ 250 (CG23) 250 2018

YAMAHA YZ 250 (CG23) 250 2017

YAMAHA YZ 250 (CG23) 250 2016

YAMAHA YZ 250 (CG23) 250 2015

YAMAHA YZ 250 (CG23) 250 2014

YAMAHA YZ 250 (CG23) 250 2013

YAMAHA YZ 250 (CG23) 250 2012

YAMAHA YZ 250 (CG23) 250 2011

YAMAHA YZ 250 (CG23) 250 2010

2009 YAMAHA YZ 250 (CG23) 250

YAMAHA YZ 250 (CG23) 250 2008

2007 YAMAHA YZ 250 (CG23) 250

YAMAHA YZ 250 (CG23) 250 2006