So...I have never bought a policy like that for a motorcycle. I have purchased 2 of them though, one for a truck, and one for our Expedition. Both got used, and both were worth their weight in gold. The first one was through my Credit Union when I did a refinance on my old truck. Kind of before today's Internet information, so I trusted my CU would have my back. The Expedition's policy came along when they solicited me. I did a LOT of research, and it paid off. That one was the best money I have ever spent!
If you're concerned, and it will give you peace of mind, do some research and buy one. I love how everyone extols how to won't have any problems, but I'm sure none of them will step up with a credit card if you run into an issue where you are looking at a large out-of-pocket expense to fix a repair that is beyond you.
Now, they are correct, these bikes fail very seldom, but stupid things happen, like the rear caliper stripping when trying to remove the bolts, or the cheesy plastic side fairings popping off at speed because the tabs broke. What any warranty is worth to you depens on how mechanical you are. If you have the knowledge, tools, and space, just about anything is possible. If you dont, well, it may just be better to turn your bike over to a dealer.
Read all the fine print, and don't pay too much. What ever you decide to do, good luck!