[CVD]

The stock ones are just fine. The thing that kills them is having your clutch out of adjustment. If its poorly adjusted it will cause the fork to pivot on the transmission case rather than the pivot ball. This causes cracks in the aluminum and it will eventually fail. This is what happened to my clutch fork.

Keep your master/slave cylinders in good shape (if the master is leaking or needs excessive adjustment, just replace it) and the stocker will be just fine.