What is the conventional wisdom on sprocket & chain renewal ?  I have got a OEM Ducati 14 tooth FR, and standard rear, and in 2-3000 miles, after some 20,000 miles in all  ( not bad with a Scottoiler )  the whole lot will need changing. 
 Is their a recommended aftermarket replacement with good quality chain & sprockets that any ST4/S pilots can recommend ?
