In general the 2013 had few issues. All CARC bikes need to have the swingarm greased, as they were chronically under-lubed from the factory. Like virtually all Moto Guzzi models, the starter wiring is prone to be under-gauged and require the famous startus-interruptus modification to be reliable. The roller issue was solved by 2013.
Other matters are just general maintenance and care by the owner.