Its about that time

[trail rider]

ok so everything has been kicks and giggles with the shee . runnin fine, jetting almost perfect. so i do a compression test a lil while ago (like last week) left says around 100, and right says around 80. know i know my tester isnt broke cause it was tellin both were around 110psi. the shee has started to not run as strong,i mean it still runs like a raped duck, but it just dont feel that powerful. im gonna do another test on it to get another reading, but i got a question first. does it need to be warm, or not? cause when not warm the pistons arent that tight against the walls right? should i go ahead and pull the head to check for wear on the pistons? ne advice would truely be grateful.