Kawasaki KX125 2003-2007 Athena 144cc 58mm Big Bore Cylinder Phathead yz65 YFM350ER Moto-4 YFM350FW Big Bear

YFM350ER Moto-4 YFM350FW Big Bear 4x4 YFZ350 Banshee 1989

SX51 (100+ octane)

9cc 100+ octane

KTM105 2018 2024 Phathead cylinder head kit GasGas MC105 Husqvarna TC105 supermini

Compression release replacement brass fitting for Phathead

Kawasaki KX125 2003-2007 Athena 144cc 58mm Big Bore Cylinder Phathead yz65 YFM350ER Moto-4 YFM350FW Big BearWe replicated the Athena chamber to offer the best performance for your two stroke big bore kit. Athena KX125 144cc big bore compatible. Use the Athena Big Bore Gasket. Phathead Kits include a head shell with one combustion chamber, 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 and transfers heat better