I would say half or more of the guys I know that have the tour styled HD, street glide, ultra, electra and heritage type bikes. They seem pretty content with tearing the valve train apart @30k or so to replace lifters, push rods and valve parts. I'm like really that's only 4 or 5 oil changes or 2 years if you ride it instead or trailer it everywhere. Now that I'm over on the Victory forums, I have not heard of any major engine issues. Some of those guys are well over 100k + But all the 106 bikes have oil coolers on them also.