I have a 06 flhtcu. as far as I can tell no real mods have been done on it. my question is, the cam chain tentioners , should they be the old spring, or hydraulic. I thought they didn't switch to hyd . until the 07 models. the reason I ask is I opened her up to inspect expecting spring type and saw the hyd. the outside one looks brand new and the inside one the little I could see with a dental mirror looked real good too. she has 65,000 on her and I was wondering if any one who knows this motor would think that they must have been changed all ready. I was just wondering. the dealer that I bought her from was no help. I don't even think they look them over before they put them back out for sale.just my opinion.