I prefer a
cheap frugal 12v air compressor, with the plastic case removed, or there is a new Slime brand compressor that has a very compact case(my new favorite). This way you have an unlimited supply of air in case the first repair doesn't hold, or maybe you can't get a good seal, but slowed the leak way down. You will be able to stop and refill as needed till you can get a proper repair or replace the tire. With the CO2 carts, once you're done, you're done. I use the string type repair plugs, along with a reamer and insert tool, and also use rubber cement. Others use the Stop and Go plugs with varying success. In any case, if you get a repair that doesn't leak, you may want to buy a lottery ticket
. There are also varying opinions on how permanent the fix is, and if you want to keep the tire on the bike with a plug in it. That's a whole other topic with the potential to turn into a tire or oil type of thread.
SteveJ, temporarily on KLR riding assignment in California