I've put 7,000 + miles on mine with no problem .
The V-7 model is enjoying its 51 st. year production run in 2018.
I understand the 850 Ambasator and the Calf.1200cc models are legidary for their reliablity too .
and
I know a fellow in Texas that has over 150,000 miles on a bike like my other two wheeler , the Suzuki LS-650 it's enjoying a 32 year production this year .
Its true about not fixing what ain't broken .
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On the Guzzi site I red about two problems , both of them from years ago. One had to do with a spark plug cap and the other with a plastic fuel filter not liking blended fuel.
Both problem are long gone.