I did a search and didn't find an answer, maybe for good reason... because it's stupid??
'01 FXDWG 37K
If I replace the cam to a SE 203, do I need to replace the lifers as well?
If the lifter are working use them, but inspect the original cam surface and the lifter rollers. I replaced my cams, with SE-203's, at around 96k miles. Today the engine has ~116k miles and still running on the same lifters.