This 41 tooth rear sprocket is made from hardened, corrosion resistant steel. Commonly (though not exclusively) used for 50cc to 500cc dirt bikes, ATVs, go karts and buggies. TaoTao product number is 103734. Approximate dimensions:
Outside Diameter: 170mm
Centre Hole Diameter: 52.1mm
Mounting Hole (centre-centre): 48mm
Mounting Hole (centre-centre diagonal): 68mm
Bolt Hole: 8.6mm
Thickness: 6.6mm