1989 sporty 883, I have a pretty good rattle in the valve train, sounds like a rocker arm. Lifters were replaced around 700 miles ago. Ive readjusted three times now and cant get the rattle out. Lifters dont look to be collapsed. There was a slight rattle after having the lifters replaced but it was slight. I hit the rev limit once but usually dont dog my horse. Before I replace the lifters again I would Like more info on the oil preasure in the lifter area. I will be replacing lifters myself this time. If there is play between the lifter and lifter block will this affect lifter oil preasure? What other if anything can affect lifter oil preasure. I will also be removing the rocker box cover so that I can inspect rocker arms and such. You never know maybe I bent something. Thanks guys. Ortigo I would like to add that this motor is stock except for nhrs breather and big city thunder baffles. Also the alen screw between the lifter blocks is rounded out, but I dont believe theres a screen in my model to look for being pluged. May have to tape it off anyways, weld a nut to it just to have a look. Im probably just looking at replacing lifters anyways cause I dont see anything bent. Strange though, you would think a lifter would be visually bad.