I have a 2000 road king why would the lifters be knocking loud it seems to be coming from the front rocker box

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Hi Doc, the OEM push rods on your year and model are non adjustable but you do have 4 options for noisy lifters:
1. with engine at operating temperature do a quick series of 5 throttle revs to 1000 RPM'S below red line.
2. Try an engine oil additive Liquid Molly Tappet Stop Noise or Risoline Engine Treatment.
3. Cut out stock push rods with bolt cutters, remove suspect lifter, disassemble lifter and clean with carb cleaner and compressed air especially under the lifter check plate, reassemble and install, replace push rods with Taper Lite Adjustable push rods.
4. Buy new lifters.
Good luck and have nice day.
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