My fj1200 stalls/quits

[Pat Conlon]

The devil's in the details....
If it was a fuel delivery problem, the bike would studder and surge like it was running out of gas...
If the bike "just quits" I would be looking at something electrical.
1st on my electrical list would be that pesky side stand switch.
The side stand switch is a normally closed switch. Normally closed meaning when the side stand is up in the riding position, the electrical circuit will be closed and your engine will run. When the side stand is down, the little tab on the stand pushes in the plunger on the switch and the circuit opens, which signals your engine to stop.(unless you're in neutral)
To rule out if it is, or is not, the side stand switch, I would  install a temporary jumper wire on the side stand switch circuit to see if that cured the problem....
If you follow the 2 wires from the side stand switch up on the left side subframe, you will find a electrical connector. Unplug the connector, the wires from the female connector goes (or should go) to the side stand switch, and the wires from the male connector goes to the ignition module. On the male connector, there are 2 prongs, get a short piece of wire and install some spade connectors on each end of the wire. Now with that wire, plug each spade onto each prong, closing the circuit on the side stand switch.
See if that does the trick.
This is of course easily reversible if you find the problem is elsewhere...just remove the jumper wire and plug back together the connectors.

Yes, you can easily check the continuity of the side stand switch circuit, but this problem sounds intermittent. What might test out fine in your garage, may be different a few miles down the road (usually in the middle of nowhere)
That's why I like the jumper wire....the circuit is closed, no ifs, ands, or buts... If the bike behaves, then you know it's time for a new side stand switch.

Just remember not to ride off with your side stand down....(don't ask)