I don't think there are problems unique to the MGX any different than the other 1400's.
It does have some quirks.
1. Wonky awkward low speed handling that can be minimized
2. The Radio/Intercom and MGMP program are terrible, almost impossible to get to work ( I was able to get mine to work). FM radio reception is a joke, as is the stock stereo.
3. High speed stability is terrible, especially when dealing with vehicle turbulence or cross winds on the highway. Some insist removing the front wheel cover helps, but I found that 90 was as fast I was willing to go without any cross winds. Adding batwing and windscreen screens helped create more downforce.
https://www.rs-motorcyclesolutions.de/en/hand-protectors-for-moto-guzzi-flying-fortress-mgx-21.html. RS Solutions also had other real nice accessories, crash bars, etc.
3. Fuel mileage sucked. Best I got was 35, and when commuting, was in the high teens.
4. Both gauges fogged internally and left streaks inside the glass, and the led lighting on one gauge was 1/2 the other.
5. Dealer setup was terrible, the batwing and left handlebar stub fell off on my 350 mile ride home.......
I made a bunch of mods, and adapted a Guzzi rear case, as the side cases are a joke for any real carry capacity. The AGO pipes sounded great, the motor is turbine smooth, fueling is pretty good
I liked the bike but not enough to keep it. Was too heavy, slow and high speed stability was unacceptable, BUT it was the most comfortable and mid speed/mid twisty Sport Touring bikes I have owned. It was fantastic in sweepers and sub 90 MPH speeds. I DONT miss it at all. Really wish I had bought the Eldo, would still have it.

Sold it to this guy, and never heard from him again.
