Originally Posted by 04 sport
The whole idea of hydraulic lifters is to take up any valve lash and eliminate valve train noise. Valve lash in an engine with hydraulic lifters should be 0. Therefore no valve tick. My car has hydraulic lifters and their quiet.
I think the whole idea of hydraulic lifters was to eliminate the adjustment of tappets...reduced clatter was just a bonus.
Some Harley engines (with hydraulic lifters) have valve noise, and it drives some guys crazy trying to find the source of the noise. But most stock engines are pretty quiet.
I would expect a Sportster engine to be quieter than a big twin, because the sporty does not have the wacky angles of the pushrods like a big twin.
Is the valve noise new, or has it always done it? 8,000 miles seems like low mileage for a lifter to go bad, but never say never....
Hopefully some Sportster experts will jump in...