Forget mushroom pluggers like Stop N Go - been there, tried that, quit that
If you want the be all and end all in tire pluggers, for both motorcycles and larger vehicles, you want Safety Seal
[ame="http://youtu.be/A_5GmVCCTn8"]Safety Seal Tire Repair - YouTube[/ame]
There are two sizes of string plugs for the Safety Seal - "regular" and "slim". I carry both on the GS when riding anywhere, especially Mexico
I bought the kit displayed, and tossed the plastic box. I take only the reamer and the inserter tool, plus a few of the two sizes of plugs.
Here's the key: once you plug the leak with Safety Seal, you won't have to worry about the plug coming loose, it'll be more permanent than the remaining life in your tire.
Tire plugging is a muscle memory task. I can't tell you how many times I've seen riders get a flat and the first time they try to figure out their tire plug kit is right then, on the side of the road with a flat. Don't be a doofus, use an old motorcycle tire and drill a hole in it, and practice with your plug kit at home, before you need those skills on the side of the road somewhere. If you've never fixed a motorcycle flat and you think you're brilliant because you bought some kind of plug kit online and you plan is to throw it in your tank bag "just in case", well, you sir are a fool and a doofus.
On Safety Seal plug strings: these are the real deal. There are super cheap imitations out there, but they're not worth a pot to, well, you know the word.
If you practice with a genuine Safety Seal string and inserter tool on a practice tire, take a look at the "knot" the string forms on the inside of your tire. Try to pull that string out with a pair of pliers. If you succeed, call me, and I'll ride up and buy you dinner.
The problem with mushroom pluggers, in addition to being much more difficult to use than a string plugger, is that the compounds used to make those mushroom plugs is suspect. And they take a lot of garage practice to get right. Notice the "success percentages" listed in above posts with Stop N Go type plugs - not very heart warming.
I've used Safety Seal on my motorcycle tires as well as my car and truck tires. Always a 100% success rate and I've never gone to a tire shop to have the puncture "permanently fixed", because with Safety Seal, 1 plug and youre done.
This is how the kit comes. I have a kit in my truck and the contents of another kit on my GS.
This is what the plug looks like just before insertion
Inserting the Safety Seal string plug. Remember: the quality of these string plugs is tops in the industry. There are two sizes of these strings, regular and slim. I carry a few of both sizes, both on the bike and in the truck.
Safety Seal slim strings. Make sure you at least have these.
No matter which brand type of plug you use, don't be a doofus and never practice with your kit. Get good at plugging in your garage, before your ride. Make sure you have the confidence that you can get off the bike and have your tire plugged and inflated in short order. This isn't to just save you time, it's to make sure you have all you need to get the job done AND ensure you've made a sure, safe repair that won't strand you much less kill you down the road.
And ditch those crappy mushroom plugs. You'll thank me later.