your vent hose is either pinched or clogged. That’s what usually causes that problem. You can do a search. There’s a good video of an 890 spewing gas all over the rider.Last weekend I rode for a couple of hours in the NC mountains. With about a half a tank, I stopped to get gas/unlocked the cap. When I lifted the cap, gas spewed out of the fill hole, all over the TFC, my GPS and over side of the body work. It appeared to be under a fairly high pressure issue.
Has anyone else had this issue? What is the cause? What is the fix?