I have two six hole rear sprocket carriers for sale both in very good condition, they will take both 520 and 525 sprockets from renthal 1, Renthal 182 offset to fit 1198 1098 etc £75 (circa £130 new) and marked as renthal 2, JT (Renthal copy) 182 offset to suit 1098 1198 etc £35 (circa £75 new) I can leave the sprockets that are on in the pics if you like or you can easily get new ones to the spec/size you want. both plus a bit for the postage.