Exhaust pipe connections
Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
Disassembling exhaust connections (i.e., muffler to head pipe, muffler to crossover) can be very difficult as the parts tend to rust together and form a
semi-permanent bond. This can be avoided, however, by applying a coat of silicone to each connection. An added benefit is that the connections are less likely to leak. I use Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, mainly because the black color is barely noticeable (a lot better than bright blue or red). Thanks to Tom Bender for this tip.
Another excellent product for this application is Wurth Exhaust Assembly Paste.