Guys, im installing a hotcam on my xr650r and noticed this little plunger type thing with a thin pin that sits inside the head, it sits basically right under where the auto decomp was on the original cam. What is this thing? what do i do with it? i can push it in, and it springs back up but i tried a slight force to lift it out and could not! didnt wanna try to hard and cause any damage before i find out what it is. do i just leave it be, as im not sure if it can be removed without removing the cylinder head? cheers.