54mm Cylinder Head Assembly for 125cc ATVs Dirt Bikes Go Karts Barrel Quad 4 Wheeler Pit Bike Dune Buggy Brand New Cylinder Head Fits similar chinese 125cc ATVs, Dirt Bikes & Go Karts Bore: 54mm; Bolt hole spacing: 50x48mm; Exhaust Bolt pattern:46mm; Intake bolt pattern: 46mm Excellent wear resistance; Precise machining size; Dependable performance with competitive price