Hello all. Like Roger, I also have a 2002 919. Like Roger, I also have two cylinders not firing. I've had it since 2010, it's always ran fine, until recently. I had to replace the battery a few weeks ago, so I put a good Yuasa AGM battery on it. I fully charged and tested it before I installed it. It started great, although I didn't ride it much. Then I decided to siphon the tank and put fresh fuel in, as I do from time to time with both bikes (the other is an '86 Yamaha Radian). I generally use ethanol free 86 octane. Before I filled the empty tank, I put about 40 ml (about an ounce and a half) of Sta-Bil 360 in the tank. I then filled the tank and started the bike. For a few seconds, it ran fine, as it always does, then it began to run like crap. After messing with it a while, I could tell it was not firing on 2 and 3. I couldn't believe that the fuel swap could have actually caused the problem, so I swapped that coil, and had the same problem. Then my starter started locking up. ?? I figured I'd have to pull the injectors and look at them, but never have messed with a throttle body or injectors on a motorcycle. It looks even more challenging than pulling the carbs on the Yamaha. Anyway... while working on it today, I pulled the cover off the airbox, and discovered the airbox was FULL of fuel. It's as if a carburetor float was stuck with the petcock left on "prime", and fuel was dumped into the airbox. My heart sank. I pulled the saturated filter out, got the fuel out of the airbox, and dried it all out. Then I turned the key to watch what would happen when the fuel pump came on. Sure enough, I heard fuel squirt, then saw fuel come out of the cylinder 2 hole in the airbox and start to run down the inside of the airbox. I'm guessing maybe the Sta-bil caused two of the injectors to stick open. I'm not sure what else could be causing that problem. I don't know if they can be saved, or if they will need to be replaced. In any case, that's the spot I'm in. And, yes, I checked the oil level, and yes, it is over-filled and probably has fuel in the crankcase. I'm guessing the reason the starter was locking up is because the motor was hydro-locking, or whatever you call it. Anyone have any ideas? Could my fuel swap and Sta-bil have caused two injectors to stick open? Any other reason fuel would be squirting into the airbox? Thanks in advance for any ideas. And Roger - I'm glad your bike's going again, and it wasn't a big issue.