I had a 13 CVO.. I really can't seem to leave them alone, which I've done many pro active work and cams, really had no issues.. Traded for a 17 CVO ~oh lordy~ no longer have that, being HD gave me a 18 CVO .. lol .. It gets worse or better .. since I no longer trust the M8 to handle what I was asking it to dish out, I secretly (from my dealer) went out and bought a 15 CVO just up the road from me. Come to find out I'm the 4th owner and it had 1470 miles on it. Paid 27k for it w V&H head pipe and Rinehart mufflers, found it had a Super Tuner but did not come w the bike, and can't get Stormy Hill HD FL to step up and locate it for me (they did the work). "Bill" bought it and dropped it on one of the saddle bags, certainly can not tell which one (must have replaced it), so "Bill" had 10.5" rear shocks put on, found that didn't work.. so he traded it to "Lucky U" FL for a Trike .. Lucky U advertised. A fellow up my way bought the CVO sight unseen w just over 1400 miles on it (had it shipped) .. He quickly realized it's to much bike and tried to sell it for 29K $2500 above NADA.. I bought it, worse riding bike I ever rode w the 10.5" rear shocks (lucky it didn't rub the wires inside the rear fender, probably would have if one of the last 2 owners put more than 75 miles on).
So now I after reading this thread and you all reminded me of issues I was fearing then and now again .. If you think back when you first bought your bike, and I see many now w 30k miles that lost lifters.. Would you say, just ride it. At the very least get ESP. If I have the bucks do it right and change all the items in question w very good aftermarket parts and put a 117ci while your at it. It really sounds good, very quiet, and rides very well now that it has 13" shocks on it.