i have a 02 roadking with 62.000 kilometers on it, i change my oil at least every 4.ooo ks amsoil 20-50 and new filter, the last two oil changes i noticed very small orange fibers in my oil filter when i cut it open, harley dealer said it is from cam tensioners and should be changed before they grenade,
also said do cam bearings, cam chains, lifters, and go to new style breathers as they are metal instead of plastic, and whatever other parts are needed to do the job

i agree with the lifters, after the bike sits for a hour or so after a long ride a lifter or 2 bang pretty loud for 30 to 60 sec, also does the same when it is stone cold,and at different speeds the lifters are noisy

anyway the harley dealer where the bike is wants $1400 plus tax to do the job, has not started yet 
 
thanks jim-d