Arctic Cat is running a promotion right now that includes a 2 year warranty. 6 month original and an 18 month Cat Care warranty. This warranty is not paid by the dealer, it is paid by Arctic Cat.
The purchase of a extended warranty is something the owner has to weigh out for themselves. If your going to mod the bike out as soon as you get it, it is possible the warranty can de refused but if your going to leave the bike stock for the warranty period it's the best thing you can have.