Your search for "monster 1200 821" revealed the following:
CNC RACING Ring gear Z40 6 holes Ducati
$123.22Ring gear Z40 P520 CNC machined from Ergal billet and then given a coloured anodized hard surface finish. The...
Ring gear Z40 P520 CNC machined from Ergal billet and then given a coloured anodized hard surface finish. The...