With all due respect to your buddy, I'd put more faith in my Mother-in-law's motorcycle expertise than I would in some of the Harley techs I've met. I've seen some horrendously incompetent work come out of Harley service shops over the years...my buddy who is a certified Harley tech
Unless previous owners were negligent in their maintenance on your bike, you shouldn't be having serious engine failures at such low mileage.