I fully realize I'm anal about this, but every year I give a bike an "annual inspection" just like an airplane. Every 2 or 3 years, I take *every* electrical connection apart, spray it with Caig DeOxit, put it back together and wiggle it around. Guzzis almost never fail mechanically, but the electrical systems need some help.
When I was going through the Monza's electrical system last Winter, I found 3 connectors that were ready to fail from corrosion. Back in another lifetime when I was an engineering modelmaker, I worked with the reliability lab making test fixtures for the salt spray booth occasionally. That's 40 hours of salty water sprayed at a harness. I've never seen a Guzzi harness that would pass that one.