Fully Modded gx390, stock stroke and bore, custom Arias piston, Arc Billet Rod (New), New Honda Crank Balanced intenally, ARC 3hp 390 flywheel @ 2.8lbs with adjustable timing, Billet adjustable Isky Camshaft, Welded Honda Head, 27cc chamber, Fully Ported, 6mm stem Titanium Valves, 1.550/1.350...