


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:
2009 YAMAHA YZ 250 (CG23) 250
2007 YAMAHA YZ 250 (CG23) 250
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