I have over 46,000 miles on mine....I honestly believe most problems with Harleys is coz we are never satisfied with factory...lol Am I right?...We want it bigger...badder..and faster...Me not being the sharpest knife in the drawer when it comes to Harley engines..or any engine for that matter..I was a commercial HVAC tech. so I know the mechanics of heating and cooling technology. So in my 46,000 miles I've never sat on the side of a highway because of my Road King... except to keep a few folks company until help arrived....BTW neither were Harleys...Did help out a fellow that ran out of gas...that was a Harley. I am very lucky as well because the Dealers I deal with are good honest folks ...I had a Big Bore kit installed..they over torqued and crack the throttle body....did not cause a problem...but was found on a check up before we went on a 4500 mile trip. They replace it without question...they were some what sure it was their fault. I at that time also ask them to check the cam chain tensioners..they found them excessively wore and replace them on my 7 year warranty.Was at 36,000 miles at that time. I now do my own maintenance with the help of this forum and "Fix My Hog " videos.Do it just to save a few bucks. If something major come up I will take it to the dealer. BTW the dealers I do deal with are all pretty great folks. I never have been to the dealer I bought the bike ..only coz its too far...lol I have three with in 25 miles of me.Of course I didn't know where the dealers were when I was looking. I bought it at a dealer about 60 miles away...Knew nothing about Harleys when I bought mine ..and I've leaned a lot. The Dealer I bought the bike is also a good one ...You run a Hot rod down a track..soon as the run finished the engine is rebuilt....you run a Chevy down a highway (factory)..its gonna go a long way with out problems...Sooo most problems is we want our Harley to be a Hot Rod...and not stock...JMHO!