Here is a review of the
Stop and Go and
Dynaplug tubeless tire plugging products (both of which I have somewhere under the seats of my motorcycles). I have used the
Stop and Go plugger twice but not the
Dynaplug. The review doesn't say which one is the best, only that both pluggers can work. I might add that I have plugged something like 8 tires over the years and then ridden on them at mostly legal speeds, while lightly loaded, until the tire tread wore out and I never had a plug leak. However most of the plugs were of the cheap car tire "steel belted" ribbon type, which work very well, but are a real bitch to install due to the ribbons usually being much larger than the hole that needs to be plugged. It takes a lot of effort and reaming to install these car tire plugs. The motorcycle-specific tire pluggers are much easier (although more complicated - you need to be able to read instructions) to install, which can be a big advantage should you need to plug a tire by the side of the road. However, they are certainly more expensive and not as easy to find at a retail store:
http://www.motorcycle.com/products/plugging-away-stopgo-vs-dynaplug-tubeless-tire-repair?utm_source=newmo20150108&utm_medium=email&utm_term=100%25%20list&utm_campaign=weekly