Kawasaki KX500 Phathead cylinder head kit with compression release 1988-2004 GASGAS KX450F (2006-2008)

KX450F (2006-2008)

KX85 & KX100 up to 2013 (see other cap for 2014+)

copper washers

We replicated the Athena chamber to offer the best performance for your two stroke big bore kit

YFB250FW Timberwolf 4x4 YFM350F Wolverine 4x4 YFM350FW Big Bear 4x4 YFM350X Warrior YFM400F Kodiak 4x4 YZ125 1997

Kawasaki KX500 Phathead cylinder head kit with compression release 1988-2004 GASGAS KX450F (2006-2008)Kawasaki KX500 Phathead cylinder head kit with compression release 1988 2004 Chamber selection: K51 42cc Stock compression K52 40. 6cc (100+ octane)K53 38. 2cc (105+ octane) Phathead Kits include a head shell with one combustion chamber, two sets of o rings, cylinder head nuts, copper washers, some stickers for your bike and tool box and installation instructions.. Phathead cylinder heads are made of 6061 T6 billet aluminum. The material is stronger