So how did you fix it? Have a kit or call a tow truck?
I was at some mountain restaurant where some Yamaha rider came up to me and asked, "If that was my GT out front?" and he thought "I had a flat rear tire." I went out and it looked fine, a albeit a bit low, but when I kicked it with my boot I could tell it was completely flat. Up on the center-stand and I found some long shard of metal in it.
I had a compressor and Stop and Go kit and I've had to use it a bunch of times on the car tires so I though I was good to go. Shot a plug in the tire and plugged in the compressor and waited 10 minutes or so. Still not coming up. A bit of spit on the area and it was still leaking.
There was a small market next door and they had a can of Fix-a-Flat so I paid the $8 for it and that actually did the trick. A bit oozed out and soon stopped, but it came up enough to get me 50 miles to home base.
I have some of that liquid stuff that Jay Leno showed on one of his Jay's Garage episodes that they put in some SUV and drove over a bunch of nails in a plank and then he drilled holes in the tire with a drill and it still held pressure. So I bought some and put in the car tires. It hammers pretty bad until 50 miles for it to coat the insides, but it still hammers at times so it isn't for maintaining a well balanced tire, imho, when I get into another vehicle without the stuff.
I ended up at some motel 500 miles from home and the desk clerk called me and told me I had a flat tire on the car. I thought "No way!" but it was flatter than the bike was visibly. Turns out it was a big lag screw that I had picked up. Luckily, I fired a plug in it (I carry a compressor in the car and another Stop-and-Go kit in the car) and the stuff plugged it fine.
I haven't figured out anything for the smaller S1000RR yet as there is not much storage room for stuff on it. Luckily, the tire profiles are low enough on the BMW bikes that a flat usually doesn't cause a bad wobble and bad outcome. They seem to bend a $$$ rim first - at least according to the CHP and their bikes.