I had my Standard's lifters ticking at about 25-30 k. They are easy to check and adjust if needed. Hopefully without starting a massive oil thread, what kind of oil and filter ? I don't remember it having anything to do with an oil change.
Meathead makes a good point! What type/weight of oil was previously used?
What type/weight did you use? Synthetic oil, synthetic blend, or conventional oil, 5wt, 10wt. or 20wt.?
If all else fails, you can always turn up the radio.