Extended service policies are one of the biggest profit centers for dealers. This is not to say they are bad. Chances are the policy buyer will not have covered repairs that exceed the cost of the policy. You are simply buying peace of mind.
I am also struggling with the decision to buy or not to buy. If I buy I would pay cash. I question whether my 14 Limited will need more than $1800 in repairs over the next 5 years. This is the finest, smoothest, coolest running Harley I have owned. I doubt I exceed 50,000 miles. Simple stage one performance upgrade.
If a component does fails, I would try to upgrade that component.
I am leaning towards not buying a warranty. I bought one for my last bike, a 07 SE ultra and never used it. IMHO, my 14 Limited is much better built than that 07 was.
Sorry for the long post, if you see a major flaw in my thinking, please post.