Manufacturers sell extended warranties to make money, so the odds are that you will come out on the losing end. There's a huge markup on the things. Dealers usually pocket half of the list price. Why else would they advertise the things so heavily?

I've had extended warranties on 2 Valkyries and a Kawasaki. I never used them once, even though one Valk was still covered at 100,000 miles. I've also had the warranties on 2 Fords. I used them a few times, but the claims weren't close to the price of the warranty. In fact, I've never owned a vehicle where I would have come out ahead had I bought an extended warranty.

I'll never buy one for my F6B. These bikes are nearly bulletproof. The problems are usually minor, and I'd rather fix those myself because the dealers are so far away.

I did buy one for my F150, mostly for convenience. I found a dealer online who sells them for a few bucks over cost. Then if something goes wrong, I just drop it off at a dealer, they give me a free rental, and it's fixed in a day. Without the warranty I'd put it off, shop around, and maybe fix it myself.