Ok so got back on it last night ran thru valves to see how many lifters weren't pumped up. Found 3 on one side & 2 on the other. Also found out carb had a Stuck Float which is why it was running so rough while I was listening to the lifters clatter I may have over-reacted & shut it down to soon before all the lifters had time get oiled & pumped. Engine has 20w-50 Royal Purple. Anyhow fired it up let it run & clean out from stuck float and after quite a few minutes all the lifter noise calmed down & seemed to run pretty well. Hopefully just a false alarm but I'm keeping an eye on it.